Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Medical Dictionary

incidence

play
noun in·ci·dence \ˈin(t)-səd-ən(t)s, -sə-ˌden(t)s\

Medical Definition of incidence

  1. 1a:  angle of incidenceb:  the arrival of something (as a ray of light) at a surface

  2. 2a:  an act or the fact or manner of occurring or affecting <diseases of domestic incidenceScience>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





Seen and Heard

What made you want to look up incidence? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a division or portion of a pool or whole

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1926873504

Which of the following best describes an easily irritated person?

superficial flashy tetchy gregarious
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ