/ Dictionary / Index H hypoxanthine: Meaning and Definition of Find definitions for: hy•po•xan•thine Pronunciation: (hī"pu-zan'thēn, -thin), [key] — n. a white, crystalline, almost water-soluble, alkaloidal purine derivative, CHNO, found in animal and vegetable tissues: used chiefly in biochemical research. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hypovolemic shock hypoxemia 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