| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a chattering or flighty, light-headed person. |
hypoxanthine hy·po·xan·thine (hī'pō-zān'thēn')
n.
A purine present in muscle and other tissues, formed during uric acid synthesis.