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English definition of “beta”

beta

noun [C or U]     /ˈbiː.tə/ US  /ˈbeɪ.t̬ə/ (symbol B, β)
the second letter of the Greek alphabet → Compare alpha, gamma, deltaLetters of alphabetsLettering and alphabets
(Definition of beta noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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