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 , 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
Business GM Theta platform, an automobile platform of General Motors Theta Networks a telecommunications software company
Music Theta (musician), a Greek musician Theta (album), by Brymo, 2022
Other uses 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
See also Thetan, in Scientology, the spirit or soul