diaphragm
英 ['daɪəfræm]
美['daɪə'fræm]
- n. 隔膜；快门，[摄] 光圈；横隔膜；隔板
英英释意
- 1. a mechanical device in a camera that controls size of aperture of the lens;
- "the new cameras adjust the diaphragm automatically"
- 2. (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration
- 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
- 4. electro-acoustic transducer that vibrates to receive or produce sound waves