/ Dictionary / Index D diverticulosis: Meaning and Definition of Find definitions for: di•ver•tic•u•lo•sis Pronunciation: (dī"vur-tik"yu-lō'sis), [key] — n. Pathol. the presence of saclike herniations of the mucosal layer of the colon through the muscular wall, common among older persons and usually producing no symptoms except occasional rectal bleeding. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: diverticulosis (Thesaurus) diverticulitis diverticulum 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