The name given to a particular level or grouping in a systematic classification of living things or organisms (taxonomy). [G. taxis, order, arrangement, + -on]
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1) a taxonomic group or entity
2) the name applied to a taxonomic group in a formal system of nomenclature
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tax·on (takґson) pl. taxґa [taxis + -on Gr. neuter ending] a particular group (category) into which related organisms are classified; the main categories are (in ascending order): species, genus, family, order, class, phylum, and kingdom.Medical dictionary. 2011.