An organism belonging to the same taxonomic genus as another organism.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "congener" in a sentence
"But the key word out of these studies that I read is the word congener, that's the word you sort of keep in mind and certain alcohols have more congeners than other alcohols."
"A congener is a thing of like nature with another."
"You have seen a congener of this species as a mystery bird, so it is possible that some of you can identify this bird's taxonomic family, and possibly even its genus."