Meaning of “photon” in the English Dictionary

british dictionary

"photon" in British English

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photonnoun [ C ]

uk /ˈfəʊ.tɒn/ us /ˈfoʊ.tɑːn/ specialized

a single unit of light

(Definition of “photon” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"photon" in American English

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photonnoun [ C ]

/ˈfoʊ·tɑn/

physics a very small piece of matter that is the basic unit of electromagnetic energy, and that travels in waves and carries light and other forms of radiation

(Definition of “photon” from the Cambridge Academic Content Dictionary © Cambridge University Press)