資料來源 : pyDict

橫隔膜,控光裝置

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Diaphragm \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
      midriff.

   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
      purposes.

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

資料來源 : WordNet®

diaphragm
     n 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