/ Dictionary / Index S slow-twitch: Meaning and Definition of Find definitions for: slow-twitch Pronunciation: (slō'twich"), [key] — adj. Physiol. of or pertaining to muscle fiber that contracts relatively slowly and is resistant to fatigue (distinguished from fast-twitch). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. slow time slow-up Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language