/ Dictionary / Index C cetaceum: Meaning and Definition of Find definitions for: ce•ta•ce•um Pronunciation: (sē-tā'shē-um, -sē-um), [key] — n. spermaceti. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cetacean cetane Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language