/ Dictionary / Index C crayfish: Meaning and Definition of Find definitions for: cray•fish Pronunciation: (krā'fish"), [key] — pl. -fish, -fish•es. Also calledany freshwater decapod crustacean of the genera Astacus and Cambarus, closely related to but smaller than the lobsters. any of several similar marine crustaceans, esp. the spiny lobster. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: crayfish (Thesaurus) crayer Crayola Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language