Medical Dictionary

photon

noun pho·ton \ˈfō-ˌtän\

Medical 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
May 24, 2015
erudite Hear it
learned or pedantic
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