/ Dictionary / Index A azathioprine: Meaning and Definition of Find definitions for: az•a•thi•o•prine Pronunciation: (az"u-thī'u-prēn"), [key] — n. Pharm. a cytotoxic purine analog, CHNOS, used as an immunosuppressive in organ transplantations and in rheumatoid arthritis and connective tissue disorders. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: azathioprine (Thesaurus) Azariah Azazel Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language