| 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 screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
Brown (broun), Michael. Born 1941.
American geneticist. He shared a 1985 Nobel Prize for discoveries related to cholesterol metabolism.