English Dictionary

zeta

/ˈziː.tə/

noun

The sixth letter of the modern Greek alphabet (Ζ (Z), ζ (z)) preceded by epsilon (Ε (E), ε (e)) and followed by eta, (Η (I), η (i)); or the seventh letter in the ancient Greek alphabet, in which it is preceded by digamma (Ϝ (W), ϝ (w))

The zeta is the sixth letter of the Greek alphabet.

意味（1）

The sixth letter of the modern Greek alphabet (Ζ (Z), ζ (z)) preceded by epsilon (Ε (E), ε (e)) and followed by eta, (Η (I), η (i)); or the seventh letter in the ancient Greek alphabet, in which it is preceded by digamma (Ϝ (W), ϝ (w))

意味（2）

(mathematics) A mathematical function formally known as the Riemann zeta function.

Zeta of 3 is irrational