zeta

Meanings

1. The sixth letter of the modern Greek alphabet (Ζ, ζ) preceded by epsilon (Ε, ε) and followed by eta, (Η, η); or the seventh letter in the ancient Greek alphabet, in which it is preceded by digamma (Ϝ, ϝ)
2. A mathematical function, formally known as the Riemann zeta function.

1. medieval state roughly equivalent to modern Montenegro.

1. A member of Los Zetas, a Mexican criminal syndicate.

1. Acronym of zero-energy thermonuclear assembly/apparatus (“a torus-shaped reactor used in the mid-20th century to carry out experiments in plasma physics and temperature-controlled thermonuclear reactions”).

Etymology

From the Ancient Greek ζῆτα (zêta). Doublet of zed.