/ Dictionary / Index B bromouracil: Meaning and Definition of Find definitions for: bro•mo•u•ra•cil Pronunciation: (brō"mō-yoor'u-sil), [key] — n. Biochem. a uracil derivative, CHNOBr, that pairs with adenine and sometimes with guanine during phage and bacterial DNA synthesis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bromomethane brompheniramine Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language