Medical Dictionary
4 ENTRIES FOUND:

photon

noun pho·ton \ˈfō-ˌtän\

Definition of PHOTON

1
:  a unit of intensity of light at the retina equal to the illumination received per square millimeter of a pupillary area from a surface having a brightness of one candle per square meter—called also troland
2
:  a quantum of electromagnetic radiation
March 30, 2015
amphibology Hear it
A phrase with more than one interpretation
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears