| 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. |
Something or someone a person views with particular dislike: “The new candidate for governor is the bête noire of all the liberals in the state.” From French, meaning “black beast.”