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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



... of the blood. There are that say it is in the neck of the heart, others in the pericardium, others in the midriff. Certain of the Neoterics, that the seat of the soul is extended from the head to the diaphragm. Pythagoras, that the animal part of the soul resides in the heart, ...
— Essays and Miscellanies - The Complete Works Volume 3 • Plutarch

... Muscles.—Sometimes difficulty of breathing is due, not to anything wrong with lungs or windpipe, but to failure in the diaphragm (or large muscular "floor" of the chest), and the other chest muscles, which work the lungs. A feeling of sinking and weakness round the waist indicates in such a case diaphragm failure. Gentle heat at the small of the back, and olive oil rubbing, form treatment for ...
— Papers on Health • John Kirk

... dia], through, [Greek: luein], to loosen), in chemistry, a process invented by Thomas Graham for separating colloidal and crystalline substances. He found that solutions could be divided into two classes according to their action upon a porous diaphragm such as parchment. If a solution, say of salt, be placed in a drum provided with a parchment bottom, termed a "dialyser," and the drum and its contents placed in a larger vessel of water, the salt ...
— Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 3 - "Destructors" to "Diameter" • Various

... a spasm of the diaphragm, caused by flatulency, indigestion, or acidity. It may be relieved by the sudden application of cold, also by two or three mouthfuls of cold water, by eating a small piece of ice, taking a pinch of snuff, ...
— Enquire Within Upon Everything - The Great Victorian Domestic Standby • Anonymous

... several facts enable us to recognise that the Cricket is by no means dead. It is simply incapable of movement, as would happen after an injection of curare. This poison kills a superior animal, for it hinders the muscular movements of the chest and diaphragm, necessary to respiration; but if a frog, which can breathe through its skin, is thus acted on it comes to life again at the end of twenty-four or forty-eight hours if the dose has not been too strong. ...
— The Industries of Animals • Frederic Houssay


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