/ Dictionary / Index B busulfan: Meaning and Definition of Find definitions for: bu•sul•fan Pronunciation: (by-sul'fun), [key] — n. Pharm. a potent cytotoxic substance, CHOS, used in the treatment of chronic myeloid leukemia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. busty busway Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language