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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

... plate-glass window, 6 by 6 in., centrally placed in the side of the gallery (Fig. 1, and Figs. 1 and 2, Plate VI). The sections are held together by a lap-joint. At each lap-joint there is, on the interior of the gallery, a 2-in. circular, angle iron, on the face of which a paper diaphragm may be placed and held in position by semicircular washers, studs, and wedges. These paper diaphragms are used to assist ...
— Transactions of the American Society of Civil Engineers, vol. LXX, Dec. 1910 • Herbert M. Wilson

... of Number 50-52, a sort of dilapidated penthouse, served as a wagon-house for market-gardeners, and no communication existed between it and the first story. It was separated by the flooring, which had neither traps nor stairs, and which formed the diaphragm of the building, as it were. The first story contained, as we have said, numerous chambers and several attics, only one of which was occupied by the old woman who took charge of Jean Valjean's housekeeping; ...
— Les Miserables - Complete in Five Volumes • Victor Hugo

... little statistical work on delusions and upon the elaborate discussion. As to Dr. Hall's question whether my data were collected to prove the a priori contention concerning the correlation of unpleasantness with lesions below the diaphragm, I would say that I expressed a suspicion of this correlation in my paper on "How Far is the Environment Responsible for Delusions," (Journal of Abnormal Psychology, June-July, 1913). I was stimulated to finish my article by the appearance of Shand's book on "The ...
— The Journal of Abnormal Psychology - Volume 10

... in his wrinkles, his looks, and his movements. Although he was hardly as straight as a billhook, he held himself so by the side of Blanche, that one would have taken him for a soldier on parade receiving his officer, and he placed his hand on his diaphragm like a man whose pleasure stifles and troubles him. Delighted with the sound of the swinging bells, the procession, the pomps, and the vanities of the said marriage, which was talked of long after the episcopal rejoicings, the women desired a harvest of Moorish girls, a deluge of old seneschals, ...
— Droll Stories, Volume 1 • Honore de Balzac

... allowed him to hear. Another diaphragm in the center of the metal across his chest took his own voice and ...
— The Finding of Haldgren • Charles Willard Diffin

... of this battery is that the electrolyte is not employed as a mobile liquid, but in a quasi-solid form, and it is, therefore, named dry gas battery. It consists of a number of elements, which are formed of a porous diaphragm of a non-conducting material (in this instance plaster of Paris), which is impregnated with dilute sulphuric acid. Both sides of this diaphragm are covered with very fine platinum leaf perforated with very numerous ...
— Scientific American Supplement, No. 717, September 28, 1889 • Various

... difficulty as is met in gunnery and rifle-shooting. The sights and the object aimed at cannot be in focus together, and a great deal depends on the form of sight. Tycho Brahe invented, and applied to the pointers of his instruments, an aperture-sight of variable area, like the iris diaphragm used now in photography. This enabled him to get the best result with stars of different brightness. The telescope not having been invented, he could not use a telescopic-sight as we now do in gunnery. This not only removes the difficulty of focussing, but makes ...
— History of Astronomy • George Forbes

... of these men, much hustled, has forgotten to have his shoes shined. He is intensely conscious of them, and tries to hide them behind his wife's skirt as they walk up the aisle. Accidentally he steps upon it, and gets a look over the shoulder which lifts his diaphragm an inch and turns his liver to water. This man will be courtmartialed when he reaches home, and he knows it. He wishes that some foreign power would invade the United States and burn down all the churches in the country, and that the bride, the bridegroom and ...
— A Book of Burlesques • H. L. Mencken

... diaphragms of various materials become sonorous when exposed to the action of an intermittent beam of sunlight, and I stated my belief that the sounds were due to molecular disturbances produced in the substance composing the diaphragm.[1] Shortly afterwards Lord Raleigh undertook a mathematical investigation of the subject and came to the conclusion that the audible effects were caused by the bending of the plates under unequal heating.[2] This explanation has recently ...
— Scientific American Supplement, No. 288 - July 9, 1881 • Various

... arboreal life was a greatly increased power of turning the head from side to side—a mobility very important in locating sounds and in exploring with the eyes. Furthermore, there came about a flattening of the chest and of the back, and the movements of the midriff (or diaphragm) came to count for more in respiration than the movements of the ribs. The sense of touch came to be of more importance and the sense of smell of less; the part of the brain receiving tidings from hand and eye and ear came to predominate over the part for receiving ...
— The Outline of Science, Vol. 1 (of 4) - A Plain Story Simply Told • J. Arthur Thomson

... which, experienced by an elderly person, would have brought the doctor in haste. In addition, his complexion altered—he broke out in fiery patches. He suffered from breathlessness and from pressure on the diaphragm. ...
— Seventeen - A Tale Of Youth And Summer Time And The Baxter Family Especially William • Booth Tarkington

... it is possible to receive wireless signals, although ordinary records are not loud enough, by using a small microphone on the repeating diaphragm and connected with a loud- speaking telephone. The chief difficulty was to get a microphone that would carry a sufficient current without burning up. There were other difficulties, but they have been surmounted ...
— The War Terror • Arthur B. Reeve

... offices and buildings used by the enemy, unscrew the earphone of telephone receivers and remove the diaphragm. Electricians and telephone repair men can make poor connections and damage insulation so that cross talk and other kinds of electrical interference will make conversations hard or ...
— Simple Sabotage Field Manual • Strategic Services

... screwed up sufficiently to bring him thus far; and to have this dirty, mud-bedraggled scrub of a boy intimate that the whole outfit should be furnished with long ears, was too much. As Homer would say, "his diaphragm became black all over." At this point Captain Birkman appeared on the scene and announced that he was responsible for me. This ended ...
— In The Ranks - From the Wilderness to Appomattox Court House • R. E. McBride

... of the exercises; the free development of a personality which grows and organizes itself is that which determines such an internal condition, just as in the body of the embryo the heart, in process of development, makes a place for itself in the space of the diastinum between the lungs, and the diaphragm assumes its arched form as a result ...
— Spontaneous Activity in Education • Maria Montessori

... the tension which is the immediate cause of the trouble. The effort to propel the voice from the throat, and use force in those most delicate muscles when it should come from the stronger muscles of the diaphragm, is like trying to make one man do the work of ten; the result must eventually be the utter collapse of the one man from over-activity, and loss of power in the ten men because of muscles unused. Clergyman's ...
— Power Through Repose • Annie Payson Call

... a long breath and began at the beginning again. She plunged a fat hand into the market basket and aimed two hollyhock tops in the general direction of Dick's diaphragm, repeating impressively: "Wee-come, Unky Dick." She took no notice of his profound bow, but looking up at Alice, who was leaning out the side of the seat watching with amused eyes, she showered another handful upon the wheels and horses hoofs ...
— Chicken Little Jane on the Big John • Lily Munsell Ritchie

... while the fancy is upon her, will be prepared to admit. I can remember bursts of grief when I was a boy, in which it seemed impossible anything should ever console me; but in one minute all would be gone, and my heart, or my spleen, or my diaphragm, as merry as ever. Believe that all is well, and you will find all will be well—very ...
— Thomas Wingfold, Curate • George MacDonald

... she was bone of my bone and flesh of my flesh," said the second giant. Of this speech Andy heard only "bone" and "flesh," and had great difficulty in maintaining the serenity of his diaphragm. ...
— Handy Andy, Vol. 2 - A Tale of Irish Life • Samuel Lover

... a thin diaphragm set in vibration by the voice or any other sound. It bears a stylus which records the vibration, on a rotating, wax-coated cylinder, in a ...
— The Great Round World and What Is Going On In It, Vol. 1, No. 28, May 20, 1897 - A Weekly Magazine for Boys and Girls • Various

... to a crushing "right" or "left" to the point of the jaw or the pit of the stomach. His proficiency in the manly art was polished and thorough and bespoke earnest application. The last doubting Thomas to be convinced came to five minutes after his diaphragm had been rudely and suddenly raised several inches by a low right hook, and as he groped for his bearings and got his wind back again he asked, very feebly, where "Kansas" was; and ...
— Bar-20 Days • Clarence E. Mulford

... much better this morning, having taken some medicine, which has removed the strange and aching feeling in my back and breast. I believe it is from the diaphragm; it must be looked to, however. I have not yet breakfasted, yet have cleared half my day's work holding it ...
— The Journal of Sir Walter Scott - From the Original Manuscript at Abbotsford • Walter Scott

... saw it all to the very end, and I sickened. I felt as though some painless accident had removed all the portion of my body below the diaphragm. It was physical sickness. I doubled over and linked my fingers across my stomach, my head down almost to the saddle. Marks and his crew had done the work for us. The cable had been cut, and the boat had ...
— Dwellers in the Hills • Melville Davisson Post

... diaphragmatic breathing in accordance with his anatomical knowledge. It consists in restoring the breath, without effort, from the commencing lift of the diaphragm to the production of the tone. He opposed it to the costal breathing, which brings the lungs suddenly into action by movements of the chest and shoulders, and causes extreme fatigue. "The chest," he says, "should be a passive ...
— Delsarte System of Oratory • Various

... lungs. If you had been born in Greece, you would have no difficulty with the word, for it is Greek for separation. It means, in fact, a separating partition, or, as I called it just now, a floor. All this is preparatory to telling you that the liver is hooked to the diaphragm in the abdomen. It is a very large mass and fills up, by itself alone, all the right side of the lower compartment, from the top downwards, to where the bones end which protect the abdomen on each side, and which are called the short ribs. Place your hand there, ...
— The History of a Mouthful of Bread - And its effect on the organization of men and animals • Jean Mace



Words linked to "Diaphragm" :   preventative, electro-acoustic transducer, muscular structure, general anatomy, camera, prophylactic device, stop, membrane, disk, contraceptive, body, musculature, anatomy, contraceptive device, torso, disc, preventive, trunk, mechanical device, iris, contraceptive diaphragm, pessary, muscle system, birth control device, photographic camera, tissue layer



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