Also found in: Thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia.
Related to taxon: derived character
n. pl. tax·a (tăk′sə)
A taxonomic category or group, such as a phylum, order, family, genus, or species.
[New Latin, back formation from taxonomy.]
n, pl taxa (ˈtæksə)
(Biology) biology any taxonomic group or rank
[C20: back formation from taxonomy]
n., pl. tax•a (ˈtæk sə)
a taxonomic category, as a species or genus.
[1945–50; < German (1926), from taxonomy]
Switch to new thesaurus
|Noun||1.||taxon - animal or plant group having natural relations|
Adapid, Adapid group - extinct small mostly diurnal lower primates that fed on leaves and fruit; abundant in North America and Europe 30 to 50 million years ago; their descendents probably include the lemurs; some authorities consider them ancestral to anthropoids but others consider them only cousins
Omomyid, Omomyid group - extinct tiny nocturnal lower primates that fed on fruit and insects; abundant in North America and Europe 30 to 50 million years ago; probably gave rise to the tarsiers; some authorities consider them ancestral to anthropoids but others consider them only cousins
kingdom - the highest taxonomic group into which organisms are grouped; one of five biological categories: Monera or Protoctista or Plantae or Fungi or Animalia
subkingdom - (biology) a taxonomic group comprising a major division of a kingdom
biological group - a group of plants or animals
variety - (biology) a taxonomic category consisting of members of a species that differ from others of the same species in minor but heritable characteristics; "varieties are frequently recognized in botany"
phylum - (biology) the major taxonomic group of animals and plants; contains classes
subphylum - (biology) a taxonomic group ranking between a phylum and a class
superphylum - (biology) a taxonomic group ranking between a phylum and below a class or subclass
class - (biology) a taxonomic group containing one or more orders
subclass - (biology) a taxonomic category below a class and above an order
superclass - (biology) a taxonomic class below a phylum and above a class
order - (biology) taxonomic group containing one or more families
suborder - (biology) taxonomic group that is a subdivision of an order
superorder - (biology) a taxonomic group ranking above an order and below a class or subclass
family - (biology) a taxonomic group containing one or more genera; "sharks belong to the fish family"
superfamily - (biology) a taxonomic group ranking below an order but above a family
subfamily - (biology) a taxonomic category below a family
tribe - (biology) a taxonomic category between a genus and a subfamily
genus - (biology) taxonomic group containing one or more species
subgenus - (biology) taxonomic group between a genus and a species
monotype - (biology) a taxonomic group with a single member (a single species or genus)
species - (biology) taxonomic group whose members can interbreed
subspecies, race - (biology) a taxonomic group that is a division of a species; usually arises as a consequence of geographical isolation within a species
var., variant, strain, form - (biology) a group of organisms within a species that differ in trivial ways from similar groups; "a new strain of microorganisms"
type - (biology) the taxonomic group whose characteristics are used to define the next higher taxon
group Pteridospermae, group Pteridospermaphyta, Pteridospermae, Pteridospermaphyta - used in some classification systems: a group of extinct fossil gymnosperms coextensive with the order Cycadofilicales
Centrospermae, group Centrospermae - used in former classification systems; approximately synonymous with order Caryophyllales