The Collaborative International Dictionary
Bitterling
Bitterling \Bit"ter*ling\, n. [G.] (Zo["o]l.) A roachlike European fish ( Rhodima amarus).
Wiktionary
bitterling
n. 1 Any of various species of small cyprinid fish in the genus ''Rhodeus''. 2 Specifically (taxlink Rhodeus amarus species noshow=1), formerly called (taxlink Rhodeus sericeus species noshow=1).