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noun, plural: congeners

(1) An organism of the same taxonomic genus as another.

(2) A muscle having similar function as another.

(3) A chemical variant; a compound having similar composition, structure, or antagonistic effect(s) as another.

(4) Something that is closely related to another thing, or that is derived from the same source.


In biology, congeners refer to organisms of the same taxonomic genus (as conspecifics pertain to organisms of the same species).

Word origin: from Latin roots meaning "born together" or "within the same race or kind"
Related forms: cogeneric or congenerous (adjective)

Also called: cogener