noun a mechanical device in a camera that controls size of aperture of the lens
Synonymsstop
noun (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration
Synonymsmidriff
noun a contraceptive device consisting of a flexible dome-shaped cup made of rubber or plastic; it is filled with spermicide and fitted over the uterine cervix
Source: WordNet 3.1, Princeton University