PHOTON


Meaning of PHOTON in English

/ ˈfəʊtɒn; NAmE ˈfoʊtɑːn/ noun

( physics ) a unit of electromagnetic energy

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WORD ORIGIN

early 20th cent.: from Greek phōs , phōt- light, on the pattern of electron .

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.