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Definition of epsilon noun from the Oxford Advanced Learner's Dictionary

epsilon

noun

/ˈepsɪlɒn/,

/epˈsaɪlən/

/ˈepsɪlɑːn/

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the fifth letter of the Greek alphabet (E, ϵ)
Word OriginGreek, ‘bare or simple E’, from psilos ‘bare’.

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See epsilon in the Oxford Advanced American Dictionary

Check pronunciation: epsilon

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