/ Dictionary / Index P porcupinefish: Meaning and Definition of Find definitions for: por•cu•pine•fish Pronunciation: (pôr'kyu-pīn"fish"), [key] — pl. -fish, -fish•es. any of several fishes of the family Diodontidae, esp. Diodon hystrix, of tropical seas, capable of inflating the body with water or air until it resembles a globe, with erection of the long spines covering the skin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: porcupinefish (Thesaurus) porcupine anteater pore Related Content Daily Word Quiz: modify Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language