/ Dictionary / Index D desideratum: Meaning and Definition of Find definitions for: de•sid•er•a•tum Pronunciation: (di-sid"u-rā'tum, -rä'-, -zid"-), [key] — pl. -ta something wanted or needed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: desideratum (Thesaurus) desiderative desiderium Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language