- Examples:
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Plymouth Rock
a boulder in Plymouth supposed to be where the Pilgrims disembarked from the Mayflower
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Aldebaran
the brightest star in Taurus
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Algol
the second brightest star in Perseus; the first known eclipsing binary
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Alpha Centauri
brightest star in Centaurus; second nearest star to the sun
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Alpha Crucis
the brightest star in the Southern Cross
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Altair
double star 15.7 light years from Earth; the brightest star in the Aquila constellation
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Andromeda
a constellation in the northern hemisphere between Cassiopeia and Pegasus; contains the Andromeda galaxy
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Antares
the brightest star in Scorpius
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Antlia
a faint constellation in the southern hemisphere near Hydra and Vela
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Apollo asteroid
an asteroid whose orbit crosses the Earth's orbit
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Apus
a constellation in the polar region of the southern hemisphere near Octans
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Aquarius
a zodiacal constellation in the southern hemisphere; between Capricornus and Pisces
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Aquila
a constellation in the Milky Way near Cygnus; contains the star Altair
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Ara
a constellation in the southern hemisphere near Telescopium and Norma
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Arcturus
the 4th brightest star and the brightest star in the constellation Bootes; 36 light-years from Earth
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Argo
formerly a large constellation in the southern hemisphere between Canis Major and the Southern Cross; now divided into Carina and Pyxis and Puppis and Vela
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Aries
a small zodiacal constellation in the northern hemisphere; between Pisces and Taurus
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Charioteer
a conspicuous constellation in the northern hemisphere; between Great Bear and Orion at edge of Milky Way
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Beta Centauri
the second brightest star in Centaurus
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Beta Crucis
the second brightest star in the Southern Cross
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Alpha Orionis
the second brightest star in Orion
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Charles's Wain
a group of seven bright stars in the constellation Ursa Major
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Bootes
a constellation in the northern hemisphere near Ursa Major
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Caelum
a constellation in the southern hemisphere near Columba and Eridanus
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Callisto
the second largest of Jupiter's satellites
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Cancer
a small zodiacal constellation in the northern hemisphere; between Leo and Gemini
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Canis Major
a constellation to the southeast of Orion; contains Sirius
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Canis Minor
a constellation to the east of Orion; contains Procyon
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Canopus
supergiant star 650 light years from Earth; second brightest star in the sky
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Capella
the brightest star in Auriga
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Capricornus
a faint zodiacal constellation in the southern hemisphere; between Sagittarius and Aquarius
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Carina
a keel-shaped constellation in the southern hemisphere; contains the start Canopus
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Cassiopeia
a W-shaped constellation in the northern hemisphere near Polaris
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Alpha Geminorum
a multiple star with 6 components; second brightest in Gemini; close to Pollux
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Centaurus
a conspicuous constellation in the southern hemisphere near the Southern Cross
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Cepheus
a faint constellation in the northern hemisphere near Cassiopeia and the pole star
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Ceres
the largest asteroid and the first discovered
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Cetus
a large constellation on the equator near Pisces and Aquarius
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Chamaeleon
a faint constellation in the polar region of the southern hemisphere near Apus and Mensa
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Circinus
a small faint constellation in the southern hemisphere near Musca and Triangulum Australe
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Columba
a constellation in the southern hemisphere near Puppis and Caelum
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Coma Berenices
a constellation in the northern hemisphere between Ursa Major and Bootes; contains a cluster of some 10,000 galaxies
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Corona Borealis
a small constellation in the northern hemisphere between Bootes and Hercules
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Corvus
a small quadrilateral constellation in the southern hemisphere near Virgo
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Crab Nebula
a remnant of a supernova detected first in 1054 AD
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Crater
a faint constellation in the southern hemisphere near Hydra and Corvus
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Cygnus
a constellation in the northern hemisphere between Pegasus and Draco in the Milky Way; contains a black hole
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Deimos
the outer of two small satellites of Mars
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Delphinus
a constellation in the northern hemisphere near Pegasus and Aquila
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Deneb
the brightest star in Cygnus
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Denebola
a star in Leo approximately 43 light years from Earth
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Dorado
a constellation in the southern hemisphere near Reticulum and Pictor; contains most of the Large Magellanic Cloud
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Dragon
a faint constellation twisting around the north celestial pole and lying between Ursa Major and Cepheus
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Earth
the 3rd planet from the sun; the planet we live on
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Epsilon Aurigae
the largest known star
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Eridanus
a constellation in the southern hemisphere near Fornax and Cetus
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Europa
the 4th largest of Jupiter's satellites; covered with a smooth shell of frozen water
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evening star
a planet (usually Venus) seen at sunset in the western sky
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Fornax
a faint constellation in the southern hemisphere near Cetus and Phoenix
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Ganymede
the largest of Jupiter's satellites
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Gemini
a zodiacal constellation in the northern hemisphere between Taurus and Cancer on the ecliptic
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Great Bear
a constellation outside the zodiac that rotates around the North Star
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Crane
a small constellation in the southern hemisphere near Phoenix
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Hercules
a large constellation in the northern hemisphere between Lyra and Corona Borealis
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Hydra
a long faint constellation in the southern hemisphere near the equator stretching between Virgo and Cancer
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Hydrus
a constellation in the southern hemisphere near the south celestial pole
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Indus
a faint constellation in the southern hemisphere near Telescopium and Tucana
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Io
the closest of Jupiter's moons; has active volcanoes
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Jupiter
the largest planet and the 5th from the sun; has many satellites and is one of the brightest objects in the night sky
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Leo
a zodiacal constellation in northern hemisphere between Cancer and Virgo
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Lepus
a constellation in the southern hemisphere near Orion and Columba
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Libra
a small faint zodiacal constellation in the southern hemisphere; between Virgo and Scorpius
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Little Bear
a constellation outside the zodiac that rotates around the North Star
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Little Dipper
a cluster of seven stars in Ursa Minor; at the end of the dipper's handle is Polaris
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Lupus
a constellation in the southern hemisphere near Centaurus
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Lyra
a small constellation in the northern hemisphere near Cygnus and Draco; contains the star Vega
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Red Planet
a small reddish planet that is the 4th from the sun and is periodically visible to the naked eye; minerals rich in iron cover its surface and are responsible for its characteristic color
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Mensa
a faint constellation in the polar region of the southern hemisphere and containing part of the Large Magellanic Cloud
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Mercury
the smallest planet and the nearest to the sun
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Microscopium
a faint constellation in the southern hemisphere near Sagittarius and Capricornus
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Moon
the natural satellite of the Earth
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Musca
a small constellation in the polar region of the southern hemisphere near the Southern Cross and Chamaeleon
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Neptune
a giant planet with a ring of ice particles; the 8th planet from the sun is the most remote of the gas giants
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Norma
a small constellation in the southern hemisphere near Lupus and Ara in the Milky Way
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Octans
the constellation that includes the southern celestial pole
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Ophiuchus
a large constellation in the equatorial region between Hercules and Scorpius
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Hunter
a constellation on the equator to the east of Taurus; contains Betelgeuse and Rigel
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Pallas
a large asteroid; the second asteroid to be discovered
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Pavo
a small constellation near the South Pole between Tucana and Ara
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Pegasus
a constellation in the northern hemisphere near Andromeda and Pisces
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Perseus
a conspicuous constellation in the northern hemisphere; between Auriga and Cassiopeia and crossed by the Milky Way
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Phobos
the larger of the two satellites of Mars
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Phoenix
a constellation in the southern hemisphere near Tucana and Sculptor
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Pictor
a constellation in the southern hemisphere near Dorado and Columba
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Pisces
a large faint zodiacal constellation; between Aquarius and Aries
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Pluto
a small planet and the farthest known planet from the sun; it has the most elliptical orbit of all the planets
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North Star
the brightest star in Ursa Minor; at the end of the handle of the Little Dipper; the northern axis of the earth points toward it
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Pollux
the brightest star in Gemini; close to Castor
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Procyon
the brightest star in Canis Minor
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Puppis
a constellation in the southern hemisphere between Vela and Canis Major that shaped like the stern of a boat
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Pyxis
a constellation in the southern hemisphere near Puppis and Antlia
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Quaoar
a planetoid discovered in 2002
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Regulus
the brightest star in Leo
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Reticulum
a small constellation in the southern hemisphere near Dorado and Hydrus
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Beta Orionis
the brightest star in Orion
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Sagitta
a small constellation in the northern hemisphere between Cygnus and Aquila and crossed by the Milky Way
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Sagittarius
a large zodiacal constellation in the southern hemisphere; between Scorpius and Capricornus
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Saturn
a giant planet that is surrounded by three planar concentric rings of ice particles; the 6th planet from the sun
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Scorpius
a large zodiacal constellation between Libra and Sagittarius
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Sculptor
a faint constellation in the southern hemisphere near Phoenix and Cetus
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Sedna
a planetoid of rock and ice about three-quarters the size of Pluto discovered in 2003; the most distant object known to orbit around the sun
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Serpens
a constellation in the equatorial region of the northern hemisphere near Ophiuchus and Corona Borealis
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Canicula
the brightest star in the sky; in Canis Major
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Crux Australis
a small conspicuous constellation in the southern hemisphere in the Milky Way near Centaurus
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Spica
the brightest star in Virgo
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Asterope
one of the stars in the star cluster Pleiades
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Sun
the star that is the source of light and heat for the planets in the solar system
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Taurus
a zodiacal constellation in the northern hemisphere near Orion; between Aries and Gemini
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Telescopium
a small constellation in the southern hemisphere near Ara
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Titan
the largest of the satellites of Saturn; has a hazy nitrogen atmosphere
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Triangulum
a small northern constellation near Perseus between Andromeda and Aries
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Triangulum Australe
a small bright constellation in the polar region of the southern hemisphere near Circinus and Apus
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Triton
the largest moon of Neptune
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Tucana
a large faint constellation in the southern hemisphere containing most of the Small Magellanic Cloud
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Uranus
a giant planet with a ring of ice particles; the 7th planet from the sun has a blue-green color and many satellites
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Vega
the brightest star in the constellation Lyra
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Vela
a constellation in the southern hemisphere between Carina and Pyxis
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Venus
the second nearest planet to the sun; it is peculiar in that its rotation is slow and retrograde (in the opposite sense of the Earth and all other planets except Uranus); it is visible from Earth as an early `morning star' or an `evening star'
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Vesta
the brightest asteroid but the fourth to be discovered
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Virgo
a large zodiacal constellation on the equator; between Leo and Libra
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Volans
a small constellation in the polar region of the southern hemisphere near Dorado and Carina
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Vulpecula
a constellation in the northern hemisphere near Cygnus and Sagitta
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Proxima Centauri
the nearest star to the sun; distance: 4.3 light years
- Types:
- show 133 types...
- hide 133 types...
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cocoon
silky envelope spun by the larvae of many insects to protect pupas and by spiders to protect eggs
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body, organic structure, physical structure
the entire structure of an organism (an animal, plant, or human being)
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body, dead body
a natural object consisting of a dead animal or person
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asterism
(astronomy) a cluster of stars (or a small constellation)
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black body, blackbody, full radiator
a hypothetical object capable of absorbing all the electromagnetic radiation falling on it
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body
an individual 3-dimensional object that has mass and that is distinguishable from other objects
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carpet
a natural object that resembles or suggests a carpet
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celestial body, heavenly body
natural objects visible in the sky
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consolidation
something that has consolidated into a compact mass
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constellation
a configuration of stars as seen from the earth
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cover, covering, natural covering
a natural object that covers or envelops
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estraterrestrial body, extraterrestrial object
a natural object existing outside the earth and outside the earth's atmosphere
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mechanism
a natural object resembling a machine in structure or function
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nest
a structure in which animals lay eggs or give birth to their young
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radiator
any object that radiates energy
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rock, stone
a lump or mass of hard consolidated mineral matter
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sample
all or part of a natural object that is collected and preserved as an example of its class
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tangle
a twisted and tangled mass that is highly interwoven
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cosmos, creation, existence, macrocosm, universe, world
everything that exists anywhere
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plant part, plant structure
any part of a plant or fungus
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carcase, carcass
the dead body of an animal especially one slaughtered and dressed for food
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carrion
the dead and rotting body of an animal; unfit for human food
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roadkill
the dead body of an animal that has been killed on a road by a vehicle
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scale
a flattened rigid plate forming part of the body covering of many animals
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shell
the hard largely calcareous covering of a mollusc or a brachiopod
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test
a hard outer covering as of some amoebas and sea urchins
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life form
the characteristic bodily form of a mature organism
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anatomy, bod, build, chassis, figure, flesh, form, frame, human body, material body, physical body, physique, shape, soma
alternative names for the body of a human being
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cadaver, clay, corpse, remains, stiff
the dead body of a human being
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mummy
a body embalmed and dried and wrapped for burial (as in ancient Egypt)
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live body
the body of a living animal or person
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body covering
any covering for the body or a body part
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case, sheath
an enveloping structure or covering enclosing an animal or plant organ or part
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integument
an outer protective covering such as the skin of an animal or a cuticle or seed coat or rind or shell
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specimen
a bit of tissue or blood or urine that is taken for diagnostic purposes
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chromosome
a threadlike strand of DNA in the cell nucleus that carries the genes in a linear order
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achondrite
a stony meteor lacking chondrules
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barrier
anything serving to maintain separation by obstructing vision or access
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bedrock
solid unweathered rock lying beneath surface deposits of soil
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beehive, hive
a structure that provides a natural habitation for bees; as in a hollow tree
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bird nest, bird's nest, birdnest
nest where birds lay their eggs and hatch their young
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blanket, mantle
anything that covers
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boulder, bowlder
a large smooth mass of rock detached from its place of origin
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calculus, concretion
a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body
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chondrite
a rock of meteoric origin containing chondrules
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clastic rock
(geology) a rock composed of broken pieces of older rocks
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closed universe
(cosmology) a universe that is spatially closed and in which there is sufficient matter to halt the expansion that began with the big bang; the visible matter is only 10 percent of the matter required for closure but there may be large amounts of dark matter
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comet
(astronomy) a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit
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core
a cylindrical sample of soil or rock obtained with a hollow drill
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crust, encrustation, incrustation
a hard outer layer that covers something
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crystal, crystallization
a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces
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drey
the nest of a squirrel
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envelope
a natural covering (as by a fluid)
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hair ball, hairball, trichobezoar
a compact mass of hair that forms in the alimentary canal (especially in the stomach of animals as a result of licking fur)
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cap, hood
a protective covering that is part of a plant
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cellular inclusion, inclusion, inclusion body
any small intracellular body found within another (characteristic of certain diseases)
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indument, indumentum
a covering of fine hairs (or sometimes scales) as on a leaf or insect
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intrusion
rock produced by an intrusive process
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mass
a body of matter without definite shape
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meteor, meteoroid
(astronomy) any of the small solid extraterrestrial bodies that hits the earth's atmosphere
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minor planet, planetoid
any of numerous small celestial bodies that move around the sun
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mouse nest, mouse's nest
where mice bear and raise their young
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natural order
the physical universe considered as an orderly system subject to natural (not human or supernatural) laws
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nature
the natural physical world including plants and animals and landscapes etc.
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nidus
a nest in which spiders or insects deposit their eggs
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outcrop, outcropping, rock outcrop
the part of a rock formation that appears above the surface of the surrounding land
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particle, subatomic particle
a body having finite mass and internal structure but negligible dimensions
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pebble
a small smooth rounded rock
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petrifaction
a rock created by petrifaction; an organic object infiltrated with mineral matter and preserved in its original form
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major planet, planet
(astronomy) any of the nine large celestial bodies in the solar system that revolve around the sun and shine by reflected light; Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto in order of their proximity to the sun; viewed from the constellation Hercules, all the planets rotate around the sun in a counterclockwise direction
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planet
any celestial body (other than comets or satellites) that revolves around a star
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planetesimal
one of many small solid celestial bodies thought to have existed at an early stage in the development of the solar system
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primary
(astronomy) a celestial body (especially a star) relative to other objects in orbit around it
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quasar, quasi-stellar radio source
a starlike object that may send out radio waves and other forms of energy; many have large red shifts
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radio source
an object that radiates radio waves
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roof
the inner top surface of a covered area or hollow space
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satellite
any celestial body orbiting around a planet or star
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shag
a matted tangle of hair or fiber
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shell
a rigid covering that envelops an object
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eggshell, shell
the exterior covering of a bird's egg
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sill
(geology) a flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock
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skim
a thin layer covering the surface of a liquid
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slough
any outer covering that can be shed or cast off (such as the cast-off skin of a snake)
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snowcap
a covering of snow (as on a mountain peak)
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star
(astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior
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star
any celestial body visible (as a point of light) from the Earth at night
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stepping stone
a stone in a marsh or shallow water that can be stepped on in crossing
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stub
a short piece remaining on a trunk or stem where a branch is lost
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tor
a prominent rock or pile of rocks on a hill
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transmission mechanism
any mechanism whereby an infectious agent is spread from a reservoir to a human being
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vesture
something that covers or cloaks like a garment
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wall rock
a rock immediately adjacent to a vein or fault
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whin, whinstone
any of various hard colored rocks (especially rocks consisting of chert or basalt)
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xenolith
(geology) a piece of rock of different origin from the igneous rock in which it is embedded
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button
any of various plant parts that resemble buttons
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thallus
a plant body without true stems or roots or leaves or vascular system; characteristic of the thallophytes
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cap, pileus
a fruiting structure resembling an umbrella or a cone that forms the top of a stalked fleshy fungus such as a mushroom
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calyptra
the hood or cap covering the calyx of certain plants: e.g., the California poppy
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volva
cuplike structure around the base of the stalk of certain fungi
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peridium
outer layer of the spore-bearing organ in many fungi
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domatium
a part of a plant (e.g., a leaf) that has been modified to provide protection for insects or mites or fungi
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pycnidium
flask-shaped asexual structure containing conidia
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stipule
a small leafy outgrowth at the base of a leaf or its stalk; usually occurring in pairs and soon shed
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tepal
an undifferentiated part of a perianth that cannot be distinguished as a sepal or a petal (as in lilies and tulips)
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gynostegium
the crown of the stamen in plants of the genus Asclepias
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chalaza
basal part of a plant ovule opposite the micropyle; where integument and nucellus are joined
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nucellus
central part of a plant ovule; contains the embryo sac
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germ tube
(botany) a slender tubular outgrowth from a spore in germination
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pollen tube
(botany) a slender tubular outgrowth from a pollen grain when deposited on the stigma for a flower; it penetrates the style and conveys the male gametes to the ovule
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pericarp, seed vessel
the ripened and variously modified walls of a plant ovary
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mentum
a projection like a chin formed by the sepals and base of the column in some orchids
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corona
(botany) the trumpet-shaped or cup-shaped outgrowth of the corolla of a daffodil or narcissus flower
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lip
(botany) either of the two parts of a bilabiate corolla or calyx
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chlamys, floral envelope, perianth, perigone, perigonium
collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils
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mycelium
the vegetative part of a fungus consisting of a mass of branching threadlike hyphae
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plant organ
a functional and structural unit of a plant or fungus
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aril
fleshy and usually brightly colored cover of some seeds that develops from the ovule stalk and partially or entirely envelopes the seed
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duct
a continuous tube formed by a row of elongated cells lacking intervening end walls
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sac, theca
a case or sheath especially a pollen sac or moss capsule
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indusium
a membrane enclosing and protecting the developing spores especially that covering the sori of a fern
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veil, velum
a membranous covering attached to the immature fruiting body of certain mushrooms
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annulus, skirt
(Fungi) a remnant of the partial veil that in mature mushrooms surrounds the stem like a collar
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plant tissue
the tissue of a plant
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tendril
slender stem-like structure by which some twining plants attach themselves to an object for support
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stump, tree stump
the base part of a tree that remains standing after the tree has been felled
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prophyll
a plant structure resembling a leaf
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stock
a plant or stem onto which a graft is made; especially a plant grown specifically to provide the root part of grafted plants
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receptacle
enlarged tip of a stem that bears the floral parts
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kernel, meat
the inner and usually edible part of a seed or grain or nut or fruit stone
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lobe
(botany) a part into which a leaf is divided
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ligule
(botany) any appendage to a plant that is shaped like a strap
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bark
tough protective covering of the woody stems and roots of trees and other woody plants
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biological clock
an innate mechanism in living organisms that controls the periodicity of many physiological functions