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Definition of quantum theory noun from the Oxford Advanced Learner's Dictionary

quantum theory

noun

/ˈkwɒntəm θɪəri/

/ˈkwɑːntəm θiːəri/,

/ˈkwɑːntəm θɪri/

[uncountable] (physics)

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a theory based on the idea that energy can only be changed in units that cannot be divided

See quantum theory in the Oxford Advanced American DictionarySee quantum theory in the Oxford Learner's Dictionary of Academic English

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