Diaphragm pump

Diaphragm pump
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. (Zo["o]l.) 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]


The Collaborative International Dictionary of English. 2000.

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  • diaphragm pump — noun a pump using a flexible diaphragm in place of a piston …   English new terms dictionary

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  • 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… …   The Collaborative International Dictionary of English

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