the 6th letter of the Greek alphabet
"The zeta appeared at the beginning of the list in his handwritten notes."
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 former cartel enforcer was arrested while posing as a legitimate business owner to evade authorities from his time in the ranks of Los Zetas."
A member of Los Zetas, a Mexican criminal syndicate.
In plain English: Zeta is the sixth letter of the Greek alphabet, often used as a symbol for variables in math and science or to represent specific sounds in music.
"The mathematician spent hours calculating complex patterns related to the zeta function during his research on prime numbers."
medieval state roughly equivalent to modern Montenegro.
"The zeta, a massive torus-shaped reactor from the mid-20th century, was designed to conduct early experiments in controlled thermonuclear fusion."
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)
The word comes from the Ancient Greek term zêta. It is a doublet of the word "zed.