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Incidence   Listen
noun
Incidence  n.  
1.
A falling on or upon; an incident; an event; an occurrence. (Obs.)
2.
(Physics) The direction in which a body, or a ray of light or heat, falls on any surface. "In equal incidences there is a considerable inequality of refractions."
3.
The rate or ratio at which something occurs; as, the incidence of murder in Los Angeles; the incidence of cancer in men over 50.
Angle of incidence, the angle which a ray of light, or the line of incidence of a body, falling on any surface, makes with a perpendicular to that surface; also formerly, the complement of this angle.
Line of incidence, the line in the direction of which a surface is struck by a body, ray of light, and the like.






Collaborative International Dictionary of English 0.48








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"Incidence" Quotes from Famous Books



... the Curious an opportunity of making Trials of that kind, to establish the Laws of Refraction, to wit, whether the Sines of the Angles of Refraction are respectively proportionable to the Sines of the Angles of Incidence: This Instrument being very proper to examine very accurately, and with little trouble, and in small quantities, the Refraction of any Liquor, not only for one inclination, but for all; whereby he is enabled to make accurate Tables. By the same also he affirms to have ...
— Philosophical Transactions of the Royal Society - Vol 1 - 1666 • Various

... Hereafter. Transmigration is a doctrine of what has gone before the present life rather than of what will follow. Every educated Anglo-Indian whom I have consulted agrees that in a modern Hindu's mouth transmigration is only a theory of the incidence of actual suffering. Here is the doctrine of karma (works), that is of transmigration or merited rebirth, in the actual life of India—transmigration and the pessimistic helplessness of which I have spoken? In the last ...
— New Ideas in India During the Nineteenth Century - A Study of Social, Political, and Religious Developments • John Morrison

... wanting in the picturesque, but no sense of comfort would make amends for it. For it is dark, especially in the centre of the corridor, and the carver of those vast joints never knows when he will strike his elbow against the walls or passers-by; while the incidence of draughts is clearly enough defined by here and there a coat- collar turned up in self-defence; for neither the glass front door, nor the wooden porch, nor our massive porter can effectually keep out the weather. ...
— Uppingham by the Sea - a Narrative of the Year at Borth • John Henry Skrine

... of his schemes, including that of an apparatus based upon the notion of exterior ballistics: the resistance of the air proportional to the square of the velocity and, according to this velocity, the exact proportion of the angle of incidence to the angle of projection. Theoretically, it was perfect; in reality there might be some unexpected hitch. It was a question for the venturesome performer, who allowed himself to be projected by a series of powerful springs, to fall accurately from pedestal to pedestal, preserving ...
— The Bill-Toppers • Andre Castaigne

... position, so that there is every probability that it will strike the ground fairly and squarely, although at the same time such an impact is not imperative, because it will explode even if the angle of incidence be only 5 degrees. It is remarkably steady in its flight, the balancing and the design of the tail frustrating completely any tendency to wobble or to turn ...
— Aeroplanes and Dirigibles of War • Frederick A. Talbot

... And physically, the human race altered just as drastically in an equally short span of time. As recently as the nineteenth century, the incidence of disease was a thousandfold greater than it is now. Life was short then. In the twentieth century disease lessened and life-expectancy doubled, in certain areas. Height and weight increased perceptibly with every passing decade. Then came Leffingwell and his injections. Height, weight, ...
— This Crowded Earth • Robert Bloch

... bearing, course, vector; set, drift, tenor; tendency &c 176; incidence; bending, trending &c v.; dip, tack, aim, collimation; steering steerage. point of the compass, cardinal points; North East, South, West; N by E, ENE, NE by N, NE, &c; rhumb^, azimuth, line of collimation. line, path, road, range, quarter, line of march; alignment, allignment^; air ...
— Roget's Thesaurus of English Words and Phrases: Body • Roget

... of a free constitution which were granted by Lewis XVI., not in consultation with deputies, not even always with public support, included religious toleration, Habeas Corpus, equal incidence of taxes, abolition of torture, decentralisation and local self-government, freedom of the press, universal suffrage, election without official candidates or influence, periodical convocation of parliament, right of voting supplies, of initiating legislation, ...
— Lectures on the French Revolution • John Emerich Edward Dalberg-Acton

... consulted, on the other hand he finds that he is not without responsibilities. The rate-collector knocks at the cottage door as well as at the farmer's. By gradual degrees village rates are becoming a serious burden, and though their chief incidence may be upon the landlord and the tenant, indirectly they begin to come home to the labourer. The school rate is voluntary, but it is none the less a rate; the cemetery, the ancient churchyard being no more ...
— Hodge and His Masters • Richard Jefferies

... the mechanical effect in a given time, is owing to the density of the medium. But can we resort to such an analogy? Every discovery in the science confirms more and more the analogy between the motions of air and the medium of space; the angle of reflexion and incidence follows the same law in both; the law of radiation and interference; and if experiments were instituted, there can be but little doubt that sound has also ...
— Outlines of a Mechanical Theory of Storms - Containing the True Law of Lunar Influence • T. Bassnett

... but still a serious internal problem for the Army was a parallel rise in the incidence of venereal disease. Various reasons have been advanced for the great postwar rise in the Army's venereal disease rate. It is obvious, for example, that the rapid conversion from war to peacetime duties gave many American soldiers new leisure and freedom to engage in ...
— Integration of the Armed Forces, 1940-1965 • Morris J. MacGregor Jr.

... sanitary conditions have been immensely improved in that country. Of course the effects of vaccination wear out in time, and that is why it is well to be revaccinated once or twice. Now there has been a remarkable progressive change in the age-incidence of smallpox "which can only be explained," says Dr. Newsholme, "on the assumption that vaccination protects children from smallpox and that the protection diminishes, though it never entirely disappears, as ...
— Popular Science Monthly Volume 86

... mental and social life; and, further, shown deducible from the ultimate principle of the persistence of force, through the mediation of several corollaries to it, viz., the instability of the homogeneous under the varied incidence of surrounding forces, the multiplication of effects by action and reaction, and segregation. Finally the principle of equilibration indicates the impassable limit at which evolution passes over ...
— History Of Modern Philosophy - From Nicolas of Cusa to the Present Time • Richard Falckenberg



Words linked to "Incidence" :   relative incidence, relative frequency, optical phenomenon, incident, angle of incidence, frequency, morbidity



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