/ Dictionary / Index L lapactic: Meaning and Definition of Find definitions for: la•pac•tic Pronunciation: (lu-pak'tik), [key] — Med. Med. —adj. purgative; cathartic. —n. a lapactic agent; purgative. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lap La Palma Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language