diaphragm (
http://definr.com/diaphragm)
n 1: a mechanical device in a camera that controls size of
aperture of the lens; "the new cameras adjust the
diaphragm automatically" [syn:
stop]
2: (anatomy) a muscular partition separating the abdominal and
thoracic cavities; functions in respiration [syn:
midriff]
3: 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 [syn:
pessary,
contraceptive diaphragm]
4: electro-acoustic transducer that vibrates to receive or
produce sound waves