Main Entry: in·ci·dence

Pronunciation: \ˈin(t)-səd-ən(t)s, -sə-ˌden(t)s\

Function: noun

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 ; especially : the rate of occurrence of new cases of a particular disease in a population being studied—compare prevalence