Dictionary Meaning and Definition on 'Taxon'
n : animal or plant group having natural relations [syn: taxonomic
group, taxonomic category]
[also: taxa (pl)]
Wikipedia Meaning and Definition on 'Taxon'
A taxon (plural: taxa) is a group of (one or more) organisms, which a taxonomist adjudges to be a unit. Usually a taxon is given a name and a rank, although neither is a requirement. Defining what belongs or does not belong to such a taxonomic group is done by a taxonomist. It is not uncommon for one taxonomist to disagree with another on what exactly belongs to a taxon, or on what exact criteria should be used for inclusion.
Taxonomists sometimes make a distinction between "good" (or natural) taxa and others that are "not good" (or artificial). Today it is common to define a good taxon as one that reflects presumptive evolutionary (phylogenetic) relationships. But this is not mandatory.
A taxon may be given a formal name, a scientific name. Such a scientific name is governed by one of the Nomenclature Codes, which sets out rules to determine which scientific name is correct for that particular grouping.[See more about Taxon at Dictionary 3.0 Encyclopedia]