AskDefine | Define diaphragm

Dictionary Definition



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

User Contributed Dictionary



From lang=grc.


  • /ˈdaɪəˌfræm/
  • /"daI@%fr

Extensive Definition

Diaphragm may refer to any of the following:


  • Thoracic diaphragm, a sheet of muscle separating the thorax and abdomen of mammals
  • Urogenital diaphragm, a layer of the pelvis separating deep perineal sac from the upper pelvis
  • Pelvic diaphragm, a pelvic muscle consisting of the Levator ani and the Coccygeus
  • A number of structures that act as diaphragms, including the iris and the eardrum
  • Any dividing structure; for example, in gasteromycetes and bryozoans, with a sense similar to that of septum

Optics and photography



See also

diaphragm in German: Diaphragma
diaphragm in Spanish: Diafragma
diaphragm in Esperanto: Diafragmo
diaphragm in French: Diaphragme
diaphragm in Indonesian: Diafragma
diaphragm in Hebrew: דיאפרגמה (פירושונים)
diaphragm in Kazakh: Диафрагма
diaphragm in Lithuanian: Diafragma (reikšmės)
diaphragm in Dutch: Diafragma
diaphragm in Polish: Przepona
diaphragm in Portuguese: Diafragma
diaphragm in Russian: Диафрагма

Synonyms, Antonyms and Related Words

IUD, abdomen, abomasum, acoustical network, bag, barrier, bay window, beerbelly, belly, birth control device, brattice, breadbasket, buffer, buffer state, bulkhead, bumper, capacitor speaker, center, cloison, coaxial speaker, collision mat, condom, cone, contraceptive, contraceptive foam, core, craw, crop, crossover network, cushion, diameter, dissepiment, dividing line, dividing wall, division, dynamic speaker, earphone, electrodynamic speaker, electromagnetic speaker, electrostatic speaker, embonpoint, equator, excited-field speaker, fender, first stomach, full-fidelity speaker, gizzard, gullet, gut, headphone, headset, heart, high-fidelity speaker, high-frequency speaker, honeycomb stomach, horn, interior, interseptum, intrauterine device, kernel, kishkes, loudspeaker, low-frequency speaker, manyplies, mat, maw, mean, median, middle, midmost, midrange speaker, midriff, midsection, midst, monorange speaker, moving-coil speaker, nucleus, omasum, oral contraceptive, pad, panel, paries, partition, party wall, paunch, permanent magnet speaker, pessary, pot, potbelly, potgut, property line, prophylactic, psalterium, pusgut, rennet bag, reticulum, rubber, rumen, second stomach, separation, septulum, septum, shock pad, skin, spare tire, speaker, speaker system, speaker unit, spermicidal jelly, spermicide, stomach, swagbelly, the pill, thick, thick of things, third stomach, triaxial speaker, tum-tum, tummy, tweeter, underbelly, ventripotence, voice coil, waist, waistline, wall, woofer, zone
Privacy Policy, About Us, Terms and Conditions, Contact Us
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2
Material from Wikipedia, Wiktionary, Dict
Valid HTML 4.01 Strict, Valid CSS Level 2.1