WordReference Random House Unabridged Dictionary of American English © 2025
hy•po•xan•thine
(hī′pə zan′thēn, -thin),USA pronunciation n.
hy′po•xan′thic, adj.
- Biochemistrya white, crystalline, almost water-soluble, alkaloidal purine derivative, C5H4N4O, found in animal and vegetable tissues: used chiefly in biochemical research.
- hypo- + xanthine 1835–45