Incidence

Incidence
The frequency with which something, such as a disease or trait, appears in a particular population or area.
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1. The number of specified new events, e.g., persons falling ill with a specified disease, during a specified period in a specified population. 2. In optics, intersection of a ray of light with a surface. [L. incido, to fall into or upon, to happen]

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in·ci·dence 'in(t)-səd-ən(t)s, -sə-.den(t)s n
1 a) ANGLE OF INCIDENCE
b) the arrival of something (as a ray of light) at a surface
2 a) an act or the fact or manner of occurring or affecting <diseases of domestic \incidence (Science)>
b) rate of occurrence or influence esp the rate of occurrence of new cases of a particular disease in a population being studied compare PREVALENCE

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in·ci·dence (inґsĭ-dəns) [L. incidere to occur, to happen] 1. the rate at which a certain event occurs, e.g., the number of new cases of a specific disease occurring during a certain period in a population at risk (see incidence rate, under rate). Cf. prevalence. 2. the arrival of radiant energy at a surface.

Medical dictionary. 2011.

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  • incidence — [ ɛ̃sidɑ̃s ] n. f. • fin XIIIe « ce qui arrive »; de incident I ♦ Vx Ce qui arrive, survient; circonstance, incident. II ♦ (1637) 1 ♦ Sc. Rencontre (d une ligne, d un corps et d une autre ligne, d une surface, etc.). Spécialt; phys., opt.… …   Encyclopédie Universelle

  • incidence — in‧ci‧dence [ˈɪnsdns] noun [singular] 1. TAX the effect of a particular tax on people or organizations, and how much they have to pay: • The structure of production may influence the incidence of taxation. 2. the number of times something… …   Financial and business terms

  • Incidence — In ci*dence, n. [Cf. F. incidence.] [1913 Webster] 1. A falling on or upon; an incident; an event; an occurrence. [Obs.] Bp. Hall. [1913 Webster] 2. (Physics) The direction in which a body, or a ray of light or heat, falls on any surface. [1913… …   The Collaborative International Dictionary of English

  • Incidence — may refer to:* Incidence (epidemiology), a measure of the risk of developing some new condition within a specified period of time * Incidence (geometry), the binary relations describing how subsets meet * Angle of incidence, a measure of… …   Wikipedia

  • incidence — (n.) early 15c., incidental matter, from M.Fr. incidence (15c.), from L.L. incidentia (see INCIDENT (Cf. incident) (n.)). Meaning act of coming into contact with is from 1650s; sense in physics is from 1620s …   Etymology dictionary

  • incidence — [in′sə dəns] n. [ME (North) < OFr < LL incidentia] 1. the act, fact, or manner of falling upon or influencing 2. the degree or range of occurrence or effect; extent of influence 3. Informal an individual or particular occurrence or… …   English World dictionary

  • incidence — index situation Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • incidence — ► NOUN 1) the occurrence, rate, or frequency of a disease, crime, or other undesirable thing. 2) Physics the intersection of a line or ray with a surface …   English terms dictionary

  • incidence — noun ADJECTIVE ▪ great, high ▪ There is a greater incidence of cancer in the families of radiation workers. ▪ peak ▪ low ▪ growing …   Collocations dictionary

  • Incidence — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. Sur les autres projets Wikimedia : « Incidence », sur le Wiktionnaire (dictionnaire universel) Le mot incidence est employé dans plusieurs… …   Wikipédia en Français

  • incidence — (in si dan s ) s. f. 1°   Terme de physique. Chute, sur une surface, d un rayon, d une onde, d une bille, en un mot de tout ce qui peut être réfléchi. •   Tous [les rayons] se brisent à leur incidence dans la boule ; chacun d eux se brise… …   Dictionnaire de la Langue Française d'Émile Littré

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