|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.|
Carroll Car·roll (kār'əl), James. 1854-1907.
British-born American physician noted for his research on yellow fever. In 1900 he deliberately infected himself with the disease for experimental purposes.