1. [ noun ] (photography) a mechanical device in a camera that controls size of aperture of the lens
Synonyms: stop

"the new cameras adjust the diaphragm automatically"

Related terms: mechanical_device iris camera
2. [ noun ] (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration
Synonyms: midriff
Related terms: muscular_structure membrane torso anatomy
3. [ noun ] (sexuality) 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
Synonyms: contraceptive_diaphragm pessary
Related terms: contraceptive
4. [ noun ] electro-acoustic transducer that vibrates to receive or produce sound waves
Related terms: disk electro-acoustic_transducer
Similar spelling:   Dippers