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Definition of diaphragm (Meaning of diaphragm)
1 Definition found
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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
	        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]

From The Collaborative International Dictionary of English v.0.44
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