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Meaning of DIAPHRAGM

Pronunciation:  'dIu`fram

WordNet Dictionary
  1. [n]  a mechanical device in a camera that controls size of aperture of the lens; "the new cameras adjust the diaphragm automatically"
  2. [n]  electro-acoustic transducer that vibrates to receive or produce sound waves
  3. [n]  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. [n]  (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration

DIAPHRAGM is a 9 letter word that starts with D.


 Synonyms: contraceptive diaphragm, midriff, pessary, stop
 See Also: birth control device, body, camera, contraceptive, contraceptive device, disc, disk, electro-acoustic transducer, iris, iris diaphragm, mechanical device, membrane, muscle system, muscular structure, musculature, photographic camera, preventative, preventive, prophylactic device, tissue layer, torso, trunk



Webster's 1913 Dictionary
\Di"a*phragm\, n. [L. diaphragma, Gr. ?, fr. ? to
fence by a partition wall; dia` through + ?, ?, to fence,
inclose; prob. akin to L. fareire to stuff: cf. F.
diaphragme. See {Farce}.]
1. A dividing membrane or thin partition, commonly with an
   opening through it.

2. (Anat.) The muscular and tendinous partition separating
   the cavity of the chest from that of the abdomen; the

3. (Zo["o]l.) A calcareous plate which divides the cavity of
   certain shells into two parts.

4. (Opt.) A plate with an opening, which is generally
   circular, used in instruments to cut off marginal portions
   of a beam of light, as at the focus of a telescope.

5. (Mach.) A partition in any compartment, for various

{Diaphragm pump}, one in which a flexible diaphragm takes the
   place of a piston.

Medical Dictionary
 Definition: primary muscle used for respiration, located just below the lung bases.
 Definition: a muscle that lies beneath the lungs. When the diaphragm contracts, the volume of the lungs increases, causing a lowering of pressure within the lungs and movement of air from the outside into the lungs. When the diaphragm relaxes, air is expelled from the lungs.
Thesaurus Terms
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