/ Dictionary / Index S systaltic: Meaning and Definition of Find definitions for: sys•tal•tic Pronunciation: (si-stôl'tik, -stal'-), [key] — adj. Physiol. rhythmically contracting. of the nature of contraction. characterized by alternate contraction and dilation, as the action of the heart. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. syst. system Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language