If you attend school, you probably have a favorite class — a series of lectures or discussions where you can learn about a particular subject, like English, math, or economics.

The characteristic of being high quality or displaying elegance is also called class. Your snobby friend might glance around your favorite diner and say, "Let's go somewhere else. This place has no class." In society, class refers to a ranking system based on socio-economics, birth, education level, or a combination of those things. Your ancestors might have been working class, until your grandfather struck it rich.

Primary Meanings of class

a collection of things sharing a common attribute
arrange or order by classes or categories
education imparted in a series of lessons or meetings
elegance in dress or behavior
a league ranked by quality
Full Definitions of class

n a collection of things sharing a common attribute

“there are two classes of detergents”
category, family
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grammatical category, syntactic category
(grammar) a category of words having the same grammatical properties
paradigm, substitution class
the class of all items that can be substituted into the same position (or slot) in a grammatical sentence (are in paradigmatic relation with one another)
brass family
(music) the family of brass instruments
violin family
(music) the family of bowed stringed instruments
woodwind family
(music) the family of woodwind instruments
a type or class
either of the two categories (male or female) into which most organisms are divided
a class of nouns or pronouns or adjectives in Indo-European languages having the same (or very similar) inflectional forms
a class of verbs having the same inflectional forms
a class of one kind of unit in a system of numbers or measures or weights or money
histocompatibility complex
a family of fifty or more genes on the sixth human chromosome that code for proteins on the surfaces of cells and that play a role in the immune response
case, grammatical case
nouns or pronouns or adjectives (often marked by inflection) related in some way to other words in a sentence
form class, part of speech, word class
one of the traditional categories of words intended to reflect their functions in a grammatical context
the grammatical category for the forms of nouns and pronouns and verbs that are used depending on the number of entities involved (singular or dual or plural)
a grammatical category used in the classification of pronouns, possessive determiners, and verb forms according to whether they indicate the speaker, the addressee, or a third party
gender, grammatical gender
a grammatical category in inflected languages governing the agreement between nouns and pronouns and adjectives; in some languages it is quite arbitrary but in Indo-European languages it is usually based on sex or animateness
a grammatical category of verbs used to express distinctions of time
participant role, semantic role
(linguistics) the underlying relation that a constituent has with the main verb in a clause
Type of:
accumulation, aggregation, assemblage, collection
several things grouped together or considered as a whole

n people having the same social, economic, or educational status

“the working class
“an emerging professional class
social class, socio-economic class, stratum
Ferdinand and Isabella
joint monarchs of Spain; Ferdinand V and Isabella I
William and Mary
joint monarchs of England; William III and Mary II
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domain, world
people in general; especially a distinctive group of people with some shared interest
age class
people in the same age range
the class of people engaged in growing food
brotherhood, fraternity, sodality
people engaged in a particular occupation
estate, estate of the realm, the three estates
a major social class or order of persons regarded collectively as part of the body politic of the country (especially in the United Kingdom) and formerly possessing distinct political rights
labor, labour, proletariat, working class
a social class comprising those who do manual labor or work for wages
lower class, underclass
the social class lowest in the social hierarchy
bourgeoisie, middle class
the social class between the lower and upper classes
class consisting of all those who are considered boobs
commonality, commonalty, commons
a class composed of persons lacking clerical or noble rank
the class of peasants
a class of woman not considered respectable because of indiscreet or promiscuous behavior
the criminal class
class of small freeholders who cultivated their own land
a social class separated from others by distinctions of hereditary rank or profession or wealth
(Hinduism) a hereditary social class among Hindus; stratified according to ritual purity
upper class, upper crust
the class occupying the highest position in the social hierarchy
a class of 14th century Japanese who were trained in martial arts and were hired for espionage and assassinations
firing line
the most advanced and responsible group in an activity
immigrant class
recent immigrants who are lumped together as a class by their low socioeconomic status in spite of different cultural backgrounds
politically moderate persons; centrists
old school
a class of people favoring traditional ideas
the customers for a particular product or service
craft, trade
people who perform a particular kind of skilled work
fair sex, woman, womanhood
women as a class
Lords Spiritual, first estate
the clergy in France and the heads of the church in Britain
Lords Temporal, second estate
the nobility in France and the peerage in Britain
Commons, third estate
the common people
fourth estate
the press, including journalists, newspaper writers, photographers
labor force, labor pool
the source of trained people from which workers can be hired
(Marxism) the unorganized lower levels of the proletariat who are not interested in revolutionary advancement
organized labor
employees who are represented by a labor union
petit bourgeois, petite bourgeoisie, petty bourgeoisie
lower middle class (shopkeepers and clerical staff etc.)
academe, academia
the academic world
Grub Street
the world of literary hacks
(Hinduism) a Hindu caste or distinctive social group of which there are thousands throughout India; a special characteristic is often the exclusive occupation of its male members (such as barber or potter)
elite, elite group
a group or class of persons enjoying superior intellectual or social or economic status
aristocracy, gentry
the most powerful members of a society
people in power, ruling class
the class of people exerting power or authority
black market
people who engage in illicit trade
Type of:
(plural) any group of human beings (men or women or children) collectively

n a body of students who are taught together

“early morning classes are always sleepy”
course, form, grade
master class
a class (especially in music) given to talented students by an expert
discussion section, section
a small class of students who are part of a larger course but are taught separately
Type of:
assemblage, gathering
a group of persons together in one place

n a body of students who graduate together

“the class of '97”
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graduating class
the body of students who graduate together this year
senior class
final grade or class in high school or college
junior class
penultimate class in high school or college
sophomore class
the second class in a four-year college or high school
freshman class
the first class in college or high school
Type of:
assemblage, gathering
a group of persons together in one place

n (biology) a taxonomic group containing one or more orders

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Schizomycetes, class Schizomycetes
a former classification
Cyanophyceae, class Cyanobacteria, class Cyanophyceae
photosynthetic bacteria found in fresh and salt water, having chlorophyll a and phycobilins; once thought to be algae: blue-green algae
Sarcodina, class Sarcodina
characterized by the formation of pseudopods for locomotion and taking food: Actinopoda; Rhizopoda
Actinopoda, subclass Actinopoda
heliozoans; radiolarians
Rhizopoda, subclass Rhizopoda
creeping protozoans: amoebas and foraminifers
Ciliata, Ciliophora, class Ciliata, class Ciliophora
class of protozoa having cilia or hairlike appendages on part or all of the surface during some part of the life cycle
Infusoria, subclass Infusoria
in some recent classifications, coextensive with the Ciliata: minute organisms found in decomposing infusions of organic matter
Chrysophyceae, Heterokontae, class Chrysophyceae, class Heterokontae
all the yellow-green algae having flagella of unequal length
Xanthophyceae, class Xanthophyceae
yellow-green algae
Bacillariophyceae, Diatomophyceae, class Bacillariophyceae, class Diatomophyceae
marine and freshwater eukaryotic algae: diatoms
Phaeophyceae, class Phaeophyceae
brown algae; mostly marine and littoral eukaryotic algae
Cyclosporeae, class Cyclosporeae
in more recent classifications superseded by the order Fucales
Euglenophyceae, class Euglenophyceae
coextensive with the division Euglenophyta
Chlorophyceae, class Chlorophyceae
algae distinguished chiefly by having flagella and a clear green color, their chlorophyll being masked little if at all by other pigments
Ulvophyceae, class Ulvophyceae
alternative name for the class Chlorophyceae in some classifications
Charophyceae, class Charophyceae
in some classifications: contains only the order Charales
Rhodophyceae, class Rhodophyceae
coextensive with the Rhodophyta: red algae
Flagellata, Mastigophora, class Flagellata, class Mastigophora
protozoa having flagella
Zoomastigina, subclass Zoomastigina
in some classifications considered a phylum of the kingdom Protista; holozoic or saprozoic flagellates
Phytomastigina, subclass Phytomastigina
plantlike flagellates containing chlorophyll; often considered unicellular algae
Cryptophyceae, class Cryptophyceae
motile usually brownish-green protozoa-like algae
Sporozoa, class Sporozoa
strictly parasitic protozoans that are usually immobile; includes plasmodia and coccidia and piroplasms and malaria parasites
Telosporidia, subclass Telosporidia
parasitic sporozoans that form spores containing one or more infective sporozoites
Acnidosporidia, subclass Acnidosporidia
a subclass of Sporozoa
Cnidosporidia, subclass Cnidosporidia
single-host parasites of lower vertebrates and invertebrates
Ascidiaceae, class Ascidiaceae
sometimes classified as an order: sea squirts
Thaliacea, class Thaliacea
small class of free-swimming tunicates; sometimes classified as an order
Larvacea, class Larvacea
small free-swimming tunicates; sometimes classified as an order
Agnatha, superclass Agnatha
superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys; hagfishes; some extinct forms
Gnathostomata, superclass Gnathostomata
comprising all vertebrates with upper and lower jaws
Placodermi, class Placodermi
extinct group of bony-plated fishes with primitive jaws
Chondrichthyes, class Chondrichthyes
cartilaginous fishes
Holocephali, subclass Holocephali
chimaeras and extinct forms
Elasmobranchii, Selachii, subclass Elasmobranchii, subclass Selachii
sharks; rays; dogfishes; skates
Aves, class Aves
(ornithology) the class of birds
Archaeornithes, subclass Archaeornithes
primitive reptile-like fossil birds of the Jurassic or early Cretaceous
amphibia, class Amphibia
the class of vertebrates that live on land but breed in water; frogs; toads; newts; salamanders; caecilians
Reptilia, class Reptilia
class of cold-blooded air-breathing vertebrates with completely ossified skeleton and a body usually covered with scales or horny plates; once the dominant land animals
Anapsida, subclass Anapsida
oldest known reptiles; turtles and extinct Permian forms
Lepidosauria, subclass Lepidosauria
diapsid reptiles: lizards; snakes; tuataras
Archosauria, subclass Archosauria
a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts
Synapsida, subclass Synapsida
extinct reptiles of the Permian to Jurassic considered ancestral to mammals
Chelicerata, superclass Chelicerata
spiders; scorpions; horseshoe crabs
Arachnida, class Arachnida
a large class of arthropods including spiders and ticks and scorpions and daddy longlegs; have four pairs of walking legs and no wings
superclass Myriapoda
used in some classifications to encompass the millipedes (Diplopoda) and centipedes (Chilopoda); formerly a large taxon including also the Pauropoda and Symphyla; the term Myriapoda now usually used synonymously with Diplopoda and limited to the millipedes
Pauropoda, class Pauropoda
an obscure class of minute arthropods with branched antennae and 8 to 10 pairs of legs
Symphyla, class Symphyla
small class of minute arthropods; unimportant except for the garden centipede
Tardigrada, class Tardigrada
in some classifications considered a separate phylum: microscopic arachnid-like invertebrates living in water or damp moss having 4 pairs of legs and instead of a mouth a pair of stylets or needlelike piercing organs connected with the pharynx
Chilopoda, class Chilopoda
arthropods having the trunk composed of numerous somites each bearing one pair of legs: centipedes
Diplopoda, Myriapoda, class Diplopoda, class Myriapoda
arthropods having the body composed of numerous double somites each with two pairs of legs: millipedes
Mammalia, class Mammalia
warm-blooded vertebrates characterized by mammary glands in the female
Prototheria, subclass Prototheria
echidnas; platypus
Pantotheria, subclass Pantotheria
generalized extinct mammals widespread during the Jurassic; commonly conceded to be ancestral to marsupial and placental mammals
Metatheria, subclass Metatheria
pouched animals
Eutheria, subclass Eutheria
all mammals except monotremes and marsupials
Hyalospongiae, class Hyalospongiae
sponges with siliceous spicules that have six rays; choanocytes are restricted to finger-shaped chambers
Scyphozoa, class Scyphozoa
coelenterates in which the polyp stage is absent or at least inconspicuous: jellyfishes
Hydrozoa, class Hydrozoa
coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes
Actinozoa, Anthozoa, class Actinozoa, class Anthozoa
a large class of sedentary marine coelenterates that includes sea anemones and corals; the medusoid phase is entirely suppressed
Nuda, class Nuda
ctenophores lacking tentacles; comprises one genus: beroe
Tentaculata, class Tentaculata
ctenophores have retractile tentacles
Turbellaria, class Turbellaria
free-living flatworms
Trematoda, class Trematoda
parasitic flatworms (including flukes)
Cestoda, class Cestoda
Aphasmidia, class Aphasmidia
one of two subgroups of Nematoda used in some classification systems
Phasmidia, class Phasmidia
one of two subgroups of Nematoda used in some classification systems
Archiannelida, class Archiannelida
a class of Annelida
Oligochaeta, class Oligochaeta
Polychaeta, class Polychaeta
marine annelid worms
Hirudinea, class Hirudinea
hermaphroditic aquatic or terrestrial or parasitic annelids
Scaphopoda, class Scaphopoda
small class of bilaterally symmetrical marine forms comprising the tooth shells
Gasteropoda, Gastropoda, class Gasteropoda, class Gastropoda
snails and slugs and their relatives
Opisthobranchia, subclass Opisthobranchia
gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea hares
Amphineura, subclass Amphineura
a class of Gastropoda
Polyplacophora, class Polyplacophora
small class of marine mollusks comprising the chitons; sometimes considered an order of the subclass Amphineura
Bivalvia, Lamellibranchia, class Bivalvia, class Lamellibranchia, class Pelecypoda
oysters; clams; scallops; mussels
Cephalopoda, class Cephalopoda
octopuses; squids; cuttlefish; pearly nautilus
Dibranchia, Dibranchiata, subclass Dibranchia, subclass Dibranchiata
comprising all living cephalopods except the family Nautilidae: the orders Octopoda (octopuses) and Decapoda (squids and cuttlefish)
Crustacea, class Crustacea
class of mandibulate arthropods including: lobsters; crabs; shrimps; woodlice; barnacles; decapods; water fleas
Malacostraca, subclass Malacostraca
largest subclass of Crustacea including most of the well-known marine, freshwater, and terrestrial crustaceans: crabs; lobsters; shrimps; sow bugs; beach flies
Entomostraca, subclass Entomostraca
in some older classifications includes the Branchiopoda and Copepoda and Ostracoda and Cirripedia; no longer in technical use
Branchiopoda, subclass Branchiopoda
primitive aquatic mainly freshwater crustaceans: fairy shrimps; brine shrimps; tadpole shrimps; can shrimps; water fleas
Copepoda, subclass Copepoda
minute planktonic or parasitic crustaceans
Ostracoda, subclass Ostracoda
seed shrimps
Cirripedia, subclass Cirripedia
Onychophora, class Onychophora
enigmatic small elongated wormlike terrestrial invertebrates of damp dark habitats in warm regions; distinct from the phylum Annelida; resemble slugs with legs and are sometimes described as the missing link between arthropods and annelids
Hexapoda, Insecta, class Hexapoda, class Insecta
insects; about five-sixths of all known animal species
Exopterygota, Hemimetabola, subclass Exopterygota
subclass of insects characterized by gradual and usually incomplete metamorphosis
Asteroidea, class Asteroidea
sea stars
Ophiuroidea, class Ophiuroidea
brittle stars and basket stars
Ophiurida, subclass Ophiurida
brittle stars
Euryalida, subclass Euryalida
basket stars
Echinoidea, class Echinoidea
sea urchins and sand dollars
Crinoidea, class Crinoidea
sea lilies
Holothuroidea, class Holothuroidea
class of echinoderms including the sea cucumbers
Hominoidea, superfamily Hominoidea
anthropoid apes and human beings
Channidae, class Channidae
Osteichthyes, class Osteichthyes
a class of fish having a skeleton composed of bone in addition to cartilage
Crossopterygii, subclass Crossopterygii
fishes having paired fins resembling limbs and regarded as ancestral to amphibians
Dipnoi, subclass Dipnoi
bony fishes of the southern hemisphere that breathe by a modified air bladder as well as gills; sometimes classified as an order of Crossopterygii
Teleostei, subclass Teleostei
large diverse group of bony fishes; includes most living species
Anthoceropsida, class Anthoceropsida
hornworts: in some classification systems included in the class Hepaticopsida
Bryopsida, Musci, class Bryopsida, class Musci
true mosses: bryophytes having leafy rather than thalloid gametophytes: comprises orders Andreaeales; Bryales; Dicranales; Eubryales; Sphagnales
Hepaticae, Hepaticopsida, class Hepaticae, class Hepaticopsida
liverworts: comprises orders Anthocerotales; Jungermanniales; Marchantiales; Sphaerocarpales
Gymnospermae, Gymnospermophyta, class Gymnospermae, division Gymnospermophyta
plants having naked seeds not enclosed in an ovary; in some systems considered a class (Gymnospermae) and in others a division (Gymnospermophyta); comprises three subdivisions (or classes): Cycadophytina (class Cycadopsida) and Gnetophytina (class Gnetopsida) and Coniferophytina (class Coniferopsida); in some classifications the Coniferophytina are divided into three groups: Pinophytina (class Pinopsida) and Ginkgophytina (class Ginkgopsida) and Taxophytina (class Taxopsida)
Gnetophyta, Gnetophytina, Gnetopsida, class Gnetopsida, subdivision Gnetophytina
gymnospermous flowering plants; supposed link between conifers and angiosperms; in some systems classified as a class (Gnetopsida) and in others as a subdivision (Gnetophytina or Gnetophyta)
Cycadophyta, Cycadophytina, Cycadopsida, class Cycadopsida, subdivision Cycadophyta, subdivision Cycadophytina
palmlike gymnosperms: includes the surviving order Cycadales and several extinct orders; possibly not a natural group; in some systems considered a class (Cycadopsida) and in others a subdivision (Cycadophytina or Cycadophyta)
Pteridospermopsida, class Pteridospermopsida
extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and allies
Coniferophyta, Coniferophytina, Coniferopsida, class Coniferopsida, subdivision Coniferophytina
cone-bearing gymnosperms dating from the Carboniferous period; most are substantial trees; includes the classes Pinopsida (subdivision Pinophytina) and Ginkgopsida (subdivision Ginkgophytina) and Taxopsida (subdivision Taxophytina) which in turn include the surviving orders Coniferales and Taxales (yews) and sometimes Ginkgoales as well as extinct orders such as Cordaitales (of the Carboniferous and Permian)
Pinophytina, Pinopsida, class Pinopsida, subdivision Pinophytina
most conifers: in some systems classified as a class (Pinopsida) and in others as a subdivision (Pinophytina); used in some classifications for one of five subdivisions of Gymnospermophyta
Taxophytina, Taxopsida, class Taxopsida, subdivision Taxophytina
yews: in some systems classified as a class (Taxopsida) and in others as a subdivision (Taxophytina) used in some classifications for one of five subdivisions of Gymnospermophyta
Ginkgophytina, Ginkgopsida, class Ginkgophytina, class Ginkgopsida, subdivision Ginkgophyta, subdivision Ginkgophytina
ginkgos: in some systems classified as a class and in others as a subdivision; used in some classifications for one of five subdivisions of Gymnospermophyta
Angiospermae, Anthophyta, Magnoliophyta, class Angiospermae, division Anthophyta, division Magnoliophyta
comprising flowering plants that produce seeds enclosed in an ovary; in some systems considered a class (Angiospermae) and in others a division (Magnoliophyta or Anthophyta)
Dicotyledonae, Dicotyledones, Magnoliopsida, class Dicotyledonae, class Dicotyledones, class Magnoliopsida
comprising seed plants that produce an embryo with paired cotyledons and net-veined leaves; divided into six (not always well distinguished) subclasses (or superorders): Magnoliidae and Hamamelidae (considered primitive); Caryophyllidae (an early and distinctive offshoot); and three more or less advanced groups: Dilleniidae; Rosidae; Asteridae
Magnoliidae, ranalian complex, subclass Magnoliidae
a group of families of trees and shrubs and herbs having well-developed perianths and apocarpous ovaries and generally regarded as the most primitive extant flowering plants; contains 36 families including Magnoliaceae and Ranunculaceae; sometimes classified as a superorder
Liliopsida, Monocotyledonae, Monocotyledones, class Liliopsida, class Monocotyledonae, class Monocotyledones
comprising seed plants that produce an embryo with a single cotyledon and parallel-veined leaves: includes grasses and lilies and palms and orchids; divided into four subclasses or superorders: Alismatidae; Arecidae; Commelinidae; and Liliidae
Alismatidae, subclass Alismatidae
one of four subclasses or superorders of Monocotyledones; comprises about 500 species in 14 families of aquatic and semiaquatic herbs
Arecidae, subclass Arecidae
one of four subclasses or superorder of Monocotyledones; comprises about 6400 species in 5 families of trees and shrubs and terrestrial herbs and a few free-floating aquatics including: Palmae; Araceae; Pandanaceae and Lemnaceae
Commelinidae, subclass Commelinidae
one of four subclasses or superorders of Monocotyledones; comprises about 19,000 species in 25 families of mostly terrestrial herbs especially of moist places including: Cyperaceae; Gramineae; Bromeliaceae; and Zingiberaceae
Caryophyllidae, subclass Caryophyllidae
a group of families of mostly flowers having basal or central placentation and trinucleate pollen (binucleate pollen is commoner in flowering plants); contains 14 families including: Caryophyllaceae (carnations and pinks); Aizoaceae; Amaranthaceae; Batidaceae; Chenopodiaceae; Cactaceae (order Opuntiales); Nyctaginaceae; Phytolaccaceae; corresponds approximately to order Caryophyllales; sometimes classified as a superorder
Asteridae, subclass Asteridae
a group of mostly sympetalous herbs and some trees and shrubs mostly with 2 fused carpels; contains 43 families including Campanulales; Solanaceae; Scrophulariaceae; Labiatae; Verbenaceae; Rubiaceae; Compositae; sometimes classified as a superorder
Rosidae, subclass Rosidae
a group of trees and shrubs and herbs mostly with polypetalous flowers; contains 108 families including Rosaceae; Crassulaceae; Myrtaceae; Melastomaceae; Euphorbiaceae; Umbelliferae
Hamamelidae, subclass Hamamelidae
a group of chiefly woody plants considered among the most primitive of angiosperms; perianth poorly developed or lacking; flowers often unisexual and often in catkins and often wind pollinated; contains 23 families including the Betulaceae and Fagaceae (includes the Amentiferae); sometimes classified as a superorder
Dilleniidae, subclass Dilleniidae
a group of families of more or less advanced trees and shrubs and herbs having either polypetalous or gamopetalous corollas and often with ovules attached to the walls of the ovary; contains 69 families including Ericaceae and Cruciferae and Malvaceae; sometimes classified as a superorder
Liliidae, subclass Liliidae
one of four subclasses or superorders of Monocotyledones; comprises 17 families including: Liliaceae; Alliaceae; Amaryllidaceae; Iridaceae; Orchidaceae; Trilliaceae
Zygomycetes, class Zygomycetes
class of fungi coextensive with subdivision Zygomycota
Myxomycetes, class Myxomycetes
the class of true slime molds; essentially equivalent to the division Myxomycota
Acrasiomycetes, class Acrasiomycetes
cellular slime molds; in some classifications placed in kingdom Protoctista
Oomycetes, class Oomycetes
nonphotosynthetic fungi that resemble algae and that reproduce by forming oospores; sometimes classified as protoctists
Chytridiomycetes, class Chytridiomycetes
a class of mostly aquatic fungi; saprophytic or parasitic on algae or fungi or plants
Eumycetes, class Eumycetes
category used in some classifications: coextensive with division Eumycota
Deuteromycetes, class Deuteromycetes
form class; coextensive with subdivision Deuteromycota
Basidiomycetes, class Basidiomycetes
large class of higher fungi coextensive with subdivision Basidiomycota
Homobasidiomycetes, subclass Homobasidiomycetes
category used in some classification systems for various basidiomycetous fungi including e.g. mushrooms and puffballs which are usually placed in the classes Gasteromycetes and Hymenomycetes
Heterobasidiomycetes, subclass Heterobasidiomycetes
category used in some classification systems for various basidiomycetous fungi including rusts and smuts
Hymenomycetes, class Hymenomycetes
used in some classifications; usually coextensive with order Agaricales: mushrooms; toadstools; agarics; bracket fungi
Ascomycetes, class Ascomycetes
large class of higher fungi coextensive with division Ascomycota: sac fungi
Euascomycetes, subclass Euascomycetes
category not used in many classification systems
Hemiascomycetes, class Hemiascomycetes
class of fungi in which no ascocarps are formed: yeasts and some plant parasites
Plectomycetes, class Plectomycetes
class of fungi in which the fruiting body is a cleistothecium (it releases spores only on decay or disintegration)
Pyrenomycetes, class Pyrenomycetes
class of fungi in which the fruiting body is a perithecium; includes powdery mildews and ergot and Neurospora
Discomycetes, subclass Discomycetes
a large and taxonomically difficult group of Ascomycetes in which the fleshy fruiting body is disklike or cup-shaped
Gasteromycetes, Gastromycetes, class Gasteromycetes, class Gastromycetes
fungi in which the hymenium is enclosed until after spores have matured: puffballs; earth stars; stinkhorn fungi
Tiliomycetes, class Tiliomycetes
category used in some systems to comprise the two orders Ustilaginales (smuts) and Uredinales (rusts)
Filicinae, Filicopsida, class Filicinae, class Filicopsida
Psilopsida, Psilotatae, class Psilopsida, class Psilotatae
whisk ferns; comprising the family Psilotaceae or Psilotatae: vascular plants with no roots, partial if any leaf differentiation, and rudimentary spore sacs
Equisetatae, Sphenopsida, class Equisetatae, class Sphenopsida
horsetails and related forms
Lycopodiate, Lycopsida, class Lycopodiate, class Lycopsida
club mosses and related forms: includes Lycopodiales; Isoetales; Selaginellales; and extinct Lepidodendrales; sometimes considered a subdivision of Tracheophyta
Lycopodineae, class Lycopodineae
alternative designation for the class Lycopsida
Type of:
taxon, taxonomic category, taxonomic group
animal or plant group having natural relations

v arrange or order by classes or categories

assort, classify, separate, sort, sort out
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unitise, unitize
separate or classify into units
catalog, catalogue
make an itemized list or catalog of; classify
separate (experiences) from the emotions relating to them
think of, regard, or classify under a subsuming principle or with a general group or in relation to another
classify anew, change the previous classification
sort according to size
dichotomise, dichotomize
divide into two opposing groups or kinds
pigeonhole, stamp, stereotype
treat or classify according to a mental stereotype
arrange into a group or groups
determine the grade of or assign a grade to
count, number
put into a group
reorganize into new groups
classify or group
chunk, collocate, lump
group or chunk together in a certain order or place side by side
batch together; assemble or process as a batch
Type of:
categorise, categorize
place into or assign to a category

n education imparted in a series of lessons or meetings

“flirting is not unknown in college classes
course, course of instruction, course of study
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adult education
a course (via lectures or correspondence) for adults who are not otherwise engaged in formal study
art class
a class in which you learn to draw or paint
childbirth-preparation class
a course that teaches pregnant women to use breathing and concentration and exercise techniques to use during labor
correspondence course
a course offered (by mail) by a correspondence school
course of lectures
a series of lectures dealing with a subject
directed study
a course of study that is supervised and controlled by a specialist in the subject
elective, elective course
a course that the student can select from among alternatives
extension course
a course offered as part of an extension service
home study
a course of study carried out at home rather than in a classroom
industrial arts
a course in the methods of using tools and machinery as taught in secondary schools and technical schools
orientation, orientation course
a course introducing a new situation or environment
propaedeutic, propaedeutics
a course that provides an introduction to an art or science (or to more advanced study generally)
refresher, refresher course
a course that reviews and updates a topic for those who have not kept abreast of developments
required course
a course that all students are required to take
a course offered for a small group of advanced students
shop, shop class
a course of instruction in a trade (as carpentry or electricity)
a brief intensive course for a small group; emphasizes problem solving
life class
an art class using a live human model
Type of:
didactics, education, educational activity, instruction, pedagogy, teaching
the activities of educating or instructing; activities that impart knowledge or skill

n elegance in dress or behavior

“she has a lot of class
Type of:
a refined quality of gracefulness and good taste

n a league ranked by quality

“he played baseball in class D for two years”
Type of:
conference, league
an association of sports teams that organizes matches for its members

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