n a mechanical device in a camera that controls size of aperture of the lens
the new cameras adjust the diaphragm automatically
n (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration
n 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
n electro-acoustic transducer that vibrates to receive or produce sound waves