Definition of taxon
1 : a scientifically classified group or entity : a taxonomic unit (such as a genus or order) of any rank Like higher taxa, subspecies are also partly objective but partly based on human decision.— Stephen Jay Gould … we know from the fossil record that this is a relict taxon … originating 13 million years ago …— Bernard Wood et al.
2 : the name applied to a taxonomic group in a formal system of nomenclature The marine triclads are formally subsumed in the taxon Maricola …— Seth Tyler
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