Meaning of “proton” in the English Dictionary

british dictionary

"proton" in British English

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protonnoun [ C ]

uk /ˈprəʊ.tɒn/ us /ˈproʊ.t̬ɑːn/

a type of elementary particle (= a very small piece of matter) with a positive electrical charge that is found in the nucleus of all atoms

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

"proton" in American English

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protonnoun [ C ]

us /ˈproʊ·tɑn/

physics, chemistry the part of an atom that has a positive electrical charge and is part of the atom's nucleus (= central part)

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