/ Dictionary / Index P platyfish: Meaning and Definition of Find definitions for: plat•y•fish Pronunciation: (plat'ē-fish"), [key] — pl. -fish, -fish•es. any of several small, yellow-gray freshwater fishes of the genus Xiphophorus, esp. X. variatus, of Mexico: popular in home aquariums, in which the color varies widely. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. platycnemia platyhelminth Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language