| 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. |
| ethology (ĭ-thŏl'ə-jē, ē-thŏl'-) Pronunciation Key
The scientific study of animal behavior, especially as it occurs in a natural environment. |