/ Dictionary / Index P percoid: Meaning and Definition of Find definitions for: per•coid Pronunciation: (pûr'koid), [key] — adj. belonging to the Percoidea, a group of acanthopterygian fishes comprising the true perches and related families, and constituting one of the largest natural groups of fishes. resembling a perch. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: percoid (Thesaurus) Percodan percolate Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language