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diaphragm 中文解釋 wordnet sense Collocation Usage Collins Definition
Noun
/ˈdīəˌfram/,
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diaphragms, plural;
  1. A dome-shaped, muscular partition separating the thorax from the abdomen in mammals. It plays a major role in breathing, as its contraction increases the volume of the thorax and so inflates the lungs

  2. A thin sheet of material forming a partition

  3. A taut, flexible membrane in mechanical or acoustic systems

  4. A thin contraceptive cap fitting over the cervix

  5. A device for varying the effective aperture of the lens in a camera or other optical system

  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
  5. In a loudspeaker, a diaphragm (generally, but not exclusively cone shaped) is the thin, semi-rigid membrane attached to the voice coil, which moves in a magnetic gap, vibrating the diaphragm, and producing sound. Diaphragms are also found in headphones, and microphones.
  6. In the anatomy of mammals, the thoracic diaphragm, or simply the diaphragm, is a sheet of internal muscle that extends across the bottom of the rib cage. The diaphragm separates the thoracic cavity (heart, lungs & ribs) from the abdominal cavity and performs an important function in respiration. ...
  7. The diaphragm is a cervical barrier type of birth control. It is a soft latex or silicone dome with a spring molded into the rim. The spring creates a seal against the walls of the vagina.
  8. In mechanics, a diaphragm is a sheet of a semi-flexible material anchored at its periphery and most often round in shape. ...
  9. In optics, a diaphragm is a thin opaque structure with an opening (aperture) at its centre. The role of the diaphragm is to stop the passage of light, except for the light passing through the aperture. ...
  10. In structural engineering, a diaphragm is a structural system used to transfer lateral loads to shear walls or frames primarily through in-plane shear stress. ...
  11. In mammals, a sheet of muscle separating the thorax from the abdomen, contracted and relaxed in respiration to draw air into and expel air from the lungs; also called thoracic diaphragm; Any of various membranes or sheets of muscle or ligament which separate one cavity from another; A ...
  12. The muscle wall between the chest and the abdomen. It is the major muscle that the body uses for breathing
  13. birth control device made of a thin flexible disk, usually made of rubber, that is designed to cover the cervix to prevent the entry of sperm during sexual intercourse.
  14. The part of a dynamic loudspeaker attached to the voice coil that moves and produces the sound. It usually has the shape of a cone or dome.
  15. large, concave muscle attached to the rib cage at bottom of the chest (top of the abdomen). Inhalation occurs when diaphragm contracts. Exhalation is passive as the muscle relaxes.
  16. Flexible membrane in a valve that deflects down onto a rigid area of the valve body to regulate water flow from the supply lines. This eliminates the possibility of debris build-up within the valve.
  17. in gasteromycetes, a homogeneous wall of hyphae that separates the gleba from the sterile base, e.g. in some species of Calvatia.
  18. Generally a five hole disc placed under the stage on a high power microscope.  Each hole is of a different diameter.  By turning it, you can vary the amount of light passing through the stage opening.  This will help to properly illuminate the specimen and increase contrast and resolution. ...
  19. The centrally located aperture that occurs at the apex of the perigone tube in Sapria and Rafflesia (but not Rhizanthes).
  20. A dome-shaped muscle that separates the thoracic and abdominal cavities.
  21. Any surface that vibrates in response to sound or is vibrated to emit sound, such as in microphones and loudspeakers. Also applied to wall and floor surfaces vibrating in response to sound or in transmitting sound.
  22. a dome shaped muscle above the abdomen and below the lungs. When it contracts it creates negative pressure within the chest allowing air to be drawn into the lungs.
  23. Lens opening. A perforated plate or adjustable opening mounted behind or between the elements of a lens used to control the amount of light that reaches the film. Openings are usually calibrated in f-numbers.
  24. Greek dia = across, and phragma = wall, hence, a partition, adjective - diaphragmatic (see also phrenic).
  25. A contraceptive device in the form of a shallow molded rubber cup that fits into the vagina over the cervix and is held in place by the vaginal muscles.