DIAPHRAGM

Definition

1. noun a mechanical device in a camera that controls size of aperture of the lens. — synonyms: stop
2. noun (anatomy) a muscular partition separating the abdominal and thoracic cavities. — synonyms: midriff
3. noun a contraceptive device consisting of a flexible dome-shaped cup made of rubber or plastic. — synonyms: pessary, contraceptive_diaphragm
4. noun electro-acoustic transducer that vibrates to receive or produce sound waves.