- Types:
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compartment
a space into which an area is subdivided
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crenel, crenelle
a notch or open space between two merlons in a crenelated battlement
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pleural space
the small potential space between the parietal and visceral layers of the pleura
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subarachnoid space
a space in the meninges beneath the arachnoid membrane and above the pia mater that contains the cerebrospinal fluid
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enclosure, natural enclosure
a naturally enclosed space
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expanse
a wide and open space or area as of surface or land or sky
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gap, opening
an open or empty space in or between things
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swath
the space created by the swing of a scythe or the cut of a mowing machine
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angle
the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians
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emptiness, vacancy, vacuum, void
an empty area or space
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hole
an unoccupied space
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cavity, enclosed space
space that is surrounded by something
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pocket
(bowling) the space between the headpin and the pins behind it on the right or left
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cell
any small compartment
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cubbyhole, pigeonhole
a small compartment
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pocket
an opening at the corner or on the side of a billiard table into which billiard balls are struck
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PO Box, POB, Post-Office box, call box, letter box
a numbered compartment in a post office where mail is put to be called for
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diastema
a gap or vacant space between two teeth
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Ranvier's nodes, nodes of Ranvier
small gaps in the myelin sheath of medullated axons
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foramen, hiatus
a natural opening or perforation through a bone or a membranous structure
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crotch, fork
the angle formed by the inner sides of the legs where they join the human trunk
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breach
an opening (especially a gap in a dike or fortification)
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cavern
any large dark enclosed space
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chasm
a deep opening in the earth's surface
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cleft, crack, crevice, fissure, scissure
a long narrow opening
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hole
an opening into or through something
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matrix
an enclosure within which something originates or develops (from the Latin for womb)
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mouth
an opening that resembles a mouth (as of a cave or a gorge)
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rift
a gap between cloud masses
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rent, rip, snag, split, tear
an opening made forcibly as by pulling apart
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sheet
any broad thin expanse or surface
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stretch
a large and unbroken expanse or distance
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window
an opening that resembles a window in appearance or function
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axil
the upper angle between an axis and an offshoot such as a branch or leafstalk
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helix angle
the constant angle at which a helix cuts the elements of a cylinder or cone
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complementary angles
two angles whose sum is a right angle
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angular distance
the angular separation between two objects as perceived by an observer
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plane angle
an angle formed by two straight lines (in the same plane)
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spherical angle
an angle formed at the intersection of the arcs of two great circles
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solid angle
an angle formed by three or more planes intersecting at a common point (the vertex)
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angle of inclination, inclination
(geometry) the angle formed by the x-axis and a given line (measured counterclockwise from the positive half of the x-axis)
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inclination, inclination of an orbit
(astronomy) the angle between the plane of the orbit and the plane of the ecliptic stated in degrees
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salient angle
an angle pointing outward; an interior angle of a polygon that is less than 180 degrees
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interior angle, internal angle
the angle inside two adjacent sides of a polygon
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exterior angle, external angle
the supplement of an interior angle of a polygon
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angle of incidence, incidence angle
the angle that a line makes with a line perpendicular to the surface at the point of incidence
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angle of reflection
the angle between a reflected ray and a line perpendicular to the reflecting surface at the point of incidence
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angle of refraction
the angle between a refracted ray and a line perpendicular to the surface between the two media at the point of refraction
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angle of extinction, extinction angle
the angle from its axis that a crystal must be rotated before appearing maximally dark when viewed in polarized light
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dogleg
angle that resembles the hind leg of a dog
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right angle
the 90 degree angle between two perpendicular lines
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oblique angle
an angle that is not a right angle or a multiple of a right angle
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reflex angle
an angle greater than 180 degrees (but less than 360)
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perigon, round angle
an angle of 360 degrees
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cutting angle
the angle between the face of a cutting tool and the surface of the work
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angle of dip, dip, inclination, magnetic dip, magnetic inclination
(physics) the angle that a magnetic needle makes with the plane of the horizon
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lead
the angle between the direction a gun is aimed and the position of a moving target (correcting for the flight time of the missile)
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magnetic declination, magnetic variation, variation
the angle (at a particular location) between magnetic north and true north
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AZ, azimuth
the azimuth of a celestial body is the angle between the vertical plane containing it and the plane of the meridian
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hollow
a cavity or space in something
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pore
any tiny hole admitting passage of a liquid (fluid or gas)
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pocket, pouch, sac, sack
an enclosed space
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polyhedral angle
the space enclosed by three or more planes that intersect in a vertex
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face angle
the angle formed by two edges of a polyhedral angle
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tilt angle
the angle a rocket makes with the vertical as it curves along its trajectory
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vertical angle
either of two equal and opposite angles formed by the intersection of two straight lines
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angle of view, view angle
the angle included by a photographic lens
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wave angle
the angle of arrival (or departure) of a radio wave with respect to the axis of an antenna array