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something closely related to another thing, or derived from the same source or stock, such as a member of the same genus, a muscle having the same function as another, or a chemical compound closely related to another in composition and exerting similar or antagonistic effects. adj., adj congener´ic, congen´erous.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
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(2005), we found the replacement of temperate species by tropical cogeners, including the replacement of the striped blenny Chasmodes bosquianus in the Northern Atlantic (Breitburg 1999, Coen et al.