| the offspring of a zebra and a donkey. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
chemoprophylaxis che·mo·pro·phy·lax·is (kē'mō-prō'fə-lāk'sĭs, kěm'ō-)
n.
Disease prevention by use of chemicals or drugs.