/ Dictionary / Index G gastrocnemius: Meaning and Definition of Find definitions for: gas•troc•ne•mi•us Pronunciation: (gas"trok-nē'mē-us, gas"tru-nē'-), [key] — pl. -mi•i the largest muscle in the calf of the leg, the action of which extends the foot, raises the heel, and assists in bending the knee. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gastrocnemius (Thesaurus) gastro- gastrocoel Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language