/ Dictionary / Index M mosquitofish: Meaning and Definition of Find definitions for: mos•qui•to•fish Pronunciation: (mu-skē'tō-fish"), [key] — pl. -fish, -fish•es. any of several fishes that feed on mosquito larvae, as Gambusia affinis, found in the southeastern U.S., now introduced into other parts of the world for mosquito control. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mosquitofish (Thesaurus) Mosquito Coast mosquito fleet Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language