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Diaphragm   /dˈaɪəfrˌæm/   Listen
Diaphragm

noun
1.
A mechanical device in a camera that controls size of aperture of the lens.  Synonym: stop.
2.
(anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration.  Synonym: 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.  Synonyms: contraceptive diaphragm, pessary.
4.
Electro-acoustic transducer that vibrates to receive or produce sound waves.



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"Diaphragm" Quotes from Famous Books



... a tin cylinder, B, having a slot cut in at D, in which a diaphragm, C, works, and is prevented from falling out by a stud fixed to its inside, and from falling inside by the stud above C. To use this, the bottom must be stopped with a cork, through which a piece of stout wire ...
— Practical Taxidermy • Montagu Browne

... attained by a man who can hardly distinguish a bar of music from a bar of soap. It depends upon three principles, which are very simple in themselves but can not be applied without careful practise. The first covers proper use of the breath. Air must be drawn into the lungs by expanding the diaphragm and abdomen, a process best seen in the natural breathing of a man who is lying on his back with all muscles relaxed. Filling the upper part of the lungs by raising the chest puts the work on the comparatively small muscles between the ribs; but filling the base of the lungs by ...
— Military Instructors Manual • James P. Cole and Oliver Schoonmaker

... is completely obviated by the arrangement shown in the annexed engravings, which is certainly a simple, strong, and substantial article. The foot of the trap is made of cast iron, the seat of the valve being of gun metal, let into the diaphragm, cast inside the hollow cylinder. The valve, D, is also of gun metal, and passing to outside through a stuffing box is connected to the central expansion pipe by a nut at E. The valve is set by two brass nuts at the top, so as to be just tight when steam hot; if, then, from the presence ...
— Scientific American Supplement, No. 484, April 11, 1885 • Various

... features, a radiant, ever-young Apollo looked; and he burst forth like the neighing of all Tattersall's,—tears streaming down his cheeks, pipe held aloft, foot clutched into the air,—loud, long-continuing, uncontrollable; a laugh not of the face and diaphragm only, but of the whole man from head to heel. The present Editor, who laughed indeed, yet with measure, began to fear all was not right: however, Teufelsdroeckh composed himself, and sank into his old stillness; ...
— Sartor Resartus, and On Heroes, Hero-Worship, and the Heroic in History • Thomas Carlyle

... the base or heating-surface, D, the chambers, b b', and diaphragm, E, or their equivalents, substantially as arranged and described, ...
— Scientific American, Vol. 17, No. 26 December 28, 1867 • Various


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