1. A mechanical device in a camera that controls size of aperture of the lens
   "the new cameras adjust the diaphragm automatically"
   - stop 
2. (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration
   - midriff 
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
   - pessary, contraceptive diaphragm 
4. Electro-acoustic transducer that vibrates to receive or produce sound waves

Derived forms: diaphragms

See also: phrenic

Type of: birth control device, contraceptive, contraceptive device, disc, disk [N. Amer], mechanical device, membrane, muscle system, muscular structure, musculature, preventative, preventive, prophylactic device, tissue layer

Part of: body, camera, electro-acoustic transducer, photographic camera, torso, trunk

Encyclopedia: Diaphragm

• Dryopteris noveboracensis
• Dryopteris oreades
• Dryopteris oreopteris
• Dryopteris phegopteris
• Dryopteris thelypteris
• Dryopteris thelypteris pubescens
• drypis
• drywall
• Ds
• dscDNA
• dsDNA
• DSL
• DTIC
• DTP
• DTs
• Du Barry
• Du Bois
• du Maurier
• duad
• dual
• dual carriageway
• dual citizenship
• dual inline package switch
• dual nationality
• dual scan display