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

sigma

noun

/ˈsɪɡmə/

/ˈsɪɡmə/

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the 18th letter of the Greek alphabet (Σ, σ)
Word OriginGreek.

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See sigma in the Oxford Advanced American Dictionary

Check pronunciation: sigma

Nearby words

noun

From the Word list

B2

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