/ Dictionary / Index C cecum: Meaning and Definition of Find definitions for: ce•cum Pronunciation: (sē'kum), [key] — pl. -ca a cul-de-sac, esp. that in which the large intestine begins. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cecum (Thesaurus) Cecropia moth CED Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language