An opening in the lightpath of a lens or objective that can regulate the amount of light that passes.
vibrates to receive or produce sound waves
(anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration
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
controls size of aperture of the lens; "the new cameras adjust the diaphragm automatically"
a mechanical device in a camera that controls size of aperture of the lens; "the new cameras adjust the diaphragm automatically"
electro-acoustic transducer that vibrates to receive or produce sound waves
a mechanical device in a camera that controls size of aperture of the lens
