photon
Concise Oxford English Dictionary © 2008 Oxford University Press:
photon /ˈfəʊtɒn/
▶noun Physics a particle representing a quantum of light or other electromagnetic radiation.
– derivatives
photonic adjective,
photonics plural noun.
photonic adjective,
photonics plural noun.
– origin early 20th cent.: from Gk phōs, phōt- ‘light’, on the pattern of electron.
'photon' also found in these Oxford entries:

