1. sigma

noun. ['ˈsɪgmə'] the 18th letter of the Greek alphabet.


  • Greek alphabet
  • alphabetic character
  • letter of the alphabet

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Rhymes with Sigma

  • stigma
  • enigma
  • sygma

Sentences with sigma

1. Noun, singular or mass
Click the first empty cell in column D, then click the sigma symbol in the Ribbon.