Meaning of diaphragm

Definition of diaphragm

(noun) a mechanical device in a camera that controls size of aperture of the lens; "the new cameras adjust the diaphragm automatically"
(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
electro-acoustic transducer that vibrates to receive or produce sound waves

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