/ Dictionary / Index B bismuthyl: Meaning and Definition of Find definitions for: bis•muth•yl Pronunciation: (biz'mu-thil), [key] — n. the univalent group BiO, occurring in certain bismuth salts, as bismuth oxychloride, BiOCl. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bismuth oxychloride bismutite 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