en Theta (disambiguation)

Theta (Θ or θ) is the eighth letter of the Greek alphabet.

Theta may also refer to:

Science and mathematics

Θ (set theory), the least ordinal α such that there is no surjection from the reals onto α
Theta (gastropod), a genus of sea snails
Theta functions, special functions of several complex variables
Theta meson, a hypothetical meson in quantum physics
Theta representation, a particular representation of the Heisenberg group of quantum mechanics
Theta wave, in biology
Theta*, a pathfinding algorithm in computer science
$f=\Theta (g)$ , a Bachmann–Landau notation in computational complexity theory
The denotation for potential temperature
A common symbol for a variable of the measure of an angle
SARS-CoV-2 Theta variant, one of the variants of SARS-CoV-2, the virus that causes COVID-19

Theta Nedra Berwick, or simply Theta, a fictional character and the protagonist of Marvel Comics' Predator by Ed Brission
Theta (finance), in quantitative finance, a first order derivative of an option pricing formula versus time
Theta role, in linguistics
Theta, Gauteng, a suburb of Johannesburg, South Africa
An IPA symbol for voiceless dental fricative
Hyundai Theta engine a four cylinder gasoline engine made by Hyundai.
Kappa Alpha Theta, a North American collegiate sorority