- 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. 2018
Examples from the Web for 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
- 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
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