Definitions for Incidenceˈɪn sɪ dəns
This page provides all possible meanings and translations of the word Incidence
Random House Webster's College Dictionary
in•ci•denceˈɪn sɪ dəns(n.)
the rate or range of occurrence or influence of something.
the striking of a ray of light, beam of electrons, etc., on a surface, or the direction of striking.
Category: Optics, Physics
Ref: angle of incidence (def. 1). 1
Origin of incidence:
incidence, relative incidence(noun)
the relative frequency of occurrence of something
the striking of a light beam on a surface
"he measured the angle of incidence of the reflected light"
The act of something happening; occurrence
The extent, or the relative frequency of something happening
The striking of radiation or a projectile upon a surface
A measure of the risk that a person develops a new condition within a specified period of time, usually a year.
a falling on or upon; an incident; an event
the direction in which a body, or a ray of light or heat, falls on any surface
Incidence is a measure of the risk of developing some new condition within a specified period of time. Although sometimes loosely expressed simply as the number of new cases during some time period, it is better expressed as a proportion or a rate with a denominator. Incidence proportion is the number of new cases within a specified time period divided by the size of the population initially at risk. For example, if a population initially contains 1,000 non-diseased persons and 28 develop a condition over two years of observation, the incidence proportion is 28 cases per 1,000 persons, i.e. 2.8%.
U.S. National Library of Medicine
The number of new cases of a given disease during a given period in a specified population. It also is used for the rate at which new events occur in a defined population. It is differentiated from PREVALENCE, which refers to all cases, new or old, in the population at a given time.
Find a translation for the Incidence definition in other languages:
Select another language: