Zeta
WordNet

noun


(1)   The 6th letter of the Greek alphabet
WiktionaryText

Noun



  1. The name of the sixth letter of the modern Greek alphabet preceded by epsilon and followed by eta,
  2. The name of the seventh letter in the ancient Greek alphabet, in which it is preceded by digamma
  3. A mathematical function formally known as the Riemann zeta function.
    Zeta of 3 is irrational
 
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