noun, plural (especially collectively) kil·li·fish, (especially referring to two or more kinds or species) kil·li·fish·es.
any of several small, oviparous cyprinodont fishes, especially of the genus Fundulus, found in salt, brackish, and fresh waters.
any of several livebearers.
Compare least killifish.
Origin of killifish
Also called kil·lie [kil-ee] /ˈkɪl i/.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for killifish
Historical Examples of killifish
While the killifish responds to a bass-viol string, there may be some fishes wholly deaf.A Guide to the Study of Fishes, Volume 1 (of 2)
David Starr Jordan
noun plural -fish or -fishes
any of various chiefly American minnow-like cyprinodont fishes of the genus Fundulus and related genera, of fresh and brackish waters: used as aquarium fishes, to control mosquitoes, and as anglers' bait
Word Origin for killifish
C19: see kill ², fish
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012