(taxonomy) A group of one or more populations of an organism or organisms seen by taxonomists to form a unit.

(proscribed) plural of taxon

Relating to taxons.

The state of being taxonic.

plural of taxonicity

(organic chemistry) The polycyclic aldehyde (1S,3R,4R,8S,11S,12R)-4,8,12,15,15-pentamethyl-7-oxotricyclo[9.3.1.0^(3,8)]pentadecane-6-carbaldehyde

In terms of taxons.

(taxonomy) A collection of organisms that is given formal recognition at some rank with a taxonomic name, but which is known to be a grouping based on similar morphological characteristics, rather than more extensive biological similarity.

(informal) A taxon that exists only to classify organisms that do not fit anywhere else, being either paraphyletic or polyphyletic and therefore not considered valid under modern rules of taxonomy.

(paleontology) A taxon that has been misidentified as having re-emerged in the fossil record after a period of presumed extinction, but is not actually a descendant of the original taxon, instead having developed a similar morphology through convergent evolution.