|1.||[ noun ] (photography) a mechanical device in a camera that controls size of aperture of the lens|
"the new cameras adjust the diaphragm automatically"
|Related terms:||mechanical_device iris camera|
|2.||[ noun ] (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration|
|Related terms:||muscular_structure membrane torso anatomy|
|3.||[ noun ] (sexuality) 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|
|4.||[ noun ] electro-acoustic transducer that vibrates to receive or produce sound waves|
|Related terms:||disk electro-acoustic_transducer|