/ Dictionary / Index Y yellowcake: Meaning and Definition of Find definitions for: yel•low•cake Pronunciation: (yel'ō-kāk"), [key] — n. a processed oxide of uranium, UO, extracted and concentrated from uranium ore: used as the raw material for commercial nuclear materials, esp. fuel elements in nuclear reactors. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: yellowcake (Thesaurus) yellow-breasted chat yellow card Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language