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   photon

   /ˈfəʊtɒn/

   noun

   • 1. a particle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass.

   Word Origin early 20th century: from Greek phōs, phōt- ‘light’, on the pattern of electron.

   Derivatives

   • 1. photonic adjective

   Scrabble Points: 11

   • P

     3

   • H

     4

   • O

     1

   • T

     1

   • O

     1

   • N

     1

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