| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
Cohen2 (kɒˈhɛn, kɔɪn) ![]() | |
| —n | |
| a variant spelling of Kohen | |
Cohen Co·hen (kō'ən), Stanley. Born 1922.
American biochemist. He shared a 1986 Nobel Prize for the discovery of the epidermal growth factor.