|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.