/ Dictionary / Index S smooth muscle: Meaning and Definition of Find definitions for: smooth' mus'cle Pronunciation: [key] — Anat. Anat. involuntary muscle tissue in the walls of viscera and blood vessels, consisting of nonstriated, spindle-shaped cells. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. smoothie smooth-shaven Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language