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| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| a gadget; dingus; thingumbob. |
| incidence (ˈɪnsɪdəns) | |
| —n | |
| 1. | degree, extent, or frequency of occurrence; amount: a high incidence of death from pneumonia |
| 2. | the act or manner of impinging on or affecting by proximity or influence |
| 3. | physics See also angle of incidence the arrival of a beam of light or particles at a surface |
| 4. | geometry the partial coincidence of two configurations, such as a point that lies on a circle |
incidence in·ci·dence (ĭn'sĭ-dəns)
n.
The extent or rate of occurrence, especially the number of new cases of a disease in a population over a period of time.
The arrival of radiation or a projectile at a surface.