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1 definition found
 for Diaphragm pump
From The Collaborative International Dictionary of English v.0.48 :

  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.
        [1913 Webster]
  
     2. (Anat.) The muscular and tendinous partition separating
        the cavity of the chest from that of the abdomen; the
        midriff.
        [1913 Webster]
  
     3. (Zool.) A calcareous plate which divides the cavity of
        certain shells into two parts.
        [1913 Webster]
  
     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.
        [1913 Webster]
  
     5. (Mach.) A partition in any compartment, for various
        purposes.
        [1913 Webster]
  
     Diaphragm pump, one in which a flexible diaphragm takes the
        place of a piston.
        [1913 Webster]

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