diaphragm

Noun

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

• 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

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

• a mechanical device in a camera that controls size of aperture of the lens
  • the new cameras adjust the diaphragm automatically
    

Related words

• Synonyms: 
  pessary , contraceptive diaphragm , midriff , stop