/ Dictionary / Index C cerous: Meaning and Definition of Find definitions for: ce•rous Pronunciation: (sēr'us), [key] — adj. Chem. containing trivalent cerium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cerous (Thesaurus) cerotype cerrado Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language