Rhyme Desk
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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."

noun: electro-acoustic transducer that vibrates to receive or produce sound waves

noun: 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

noun: (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration