/ Dictionary / Index D diverticulum: Meaning and Definition of Find definitions for: di•ver•tic•u•lum Pronunciation: (dī"vur-tik'yu-lum), [key] — pl. -la a blind, tubular sac or process branching off from a canal or cavity, esp. an abnormal, saclike herniation of the mucosal layer through the muscular wall of the colon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: diverticulum (Thesaurus) diverticulosis divertimento Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language