|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.|
|sexually transmitted disease (sěk'sh-ə-lē) Pronunciation Key
Any of various infectious diseases, such as chlamydia, gonorrhea, and syphilis, that are transmitted through sexual intercourse or other intimate sexual contact. Also called venereal disease.