bitterling

noun

bit·​ter·​ling

ˈbitə(r)liŋ

plural -s

: a small European cyprinid fish (Rhodeus amarus) introduced and locally common about New York that is much used in bioassay of mammalian hormones see bitterling test, japanese bitterling

Word History

Etymology

German, from bitter (from Old High German bittar) + -ling

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