ζ

Symbol

 * 1)  A mathematical function formally known as the Riemann zeta function.

Letter

 * 1) The 10th letter of the Albanian alphabet, called Arvanitic or Arvanitika and written in the Greek script. ,

Etymology
Derived from its majuscule counterpart Ζ, from the Phoenician letter 𐤆, zayin.

Letter

 * 1) Lower-case zeta, the seventh letter of the ancient Greek alphabet. Its name was ζῆτα. The sound it represented is disputed, some claim it was, others claim it was . It is preceded by ϝ and followed by η.

Letter

 * 1) Lower-case zeta, the sixth letter of the modern Greek alphabet. Its name is ζήτα and it represents a voiced alveolar fricative: . It is preceded by ε and followed by η.