Epsilon (Ε, ε) is the fifth letter of the Greek alphabet.
Epsilon may also refer to:
Aviation Advance Epsilon, a Swiss paraglider design Socata TB 30 Epsilon, a French training aircraft design
Arts and entertainment Books Epsilon, the lowest caste of the World State in the novel Brave New World Film and television E Channel, also known as Epsilontv, former name of Open TV, a Greek TV channel Epsilon, an AI fragment in the web series Red vs. Blue , an elf girl and the fifth member of Shadow Garden in the light novel and anime series The Eminence in Shadow Epsilon (film) (also titled Alien Visitor) (1995) AustralianItalian science fiction film by Rolf de Heer Epsilon TV, a Greek regional TV channel
Music Epsilon (Blood Stain Child album) Epsilon (Dreamtale album) Video games Epsilon, an antagonist in the video game Mega Man X: Command Mission The Epsilon Program, a fictional religious cult in the video game Grand Theft Auto V
Mathematics Error in numerical analysis: Machine epsilon, an error bound in computer arithmetic absolute value of an approximation error The epsilon operator introduced by Hilbert An infinitesimal value
Technology EPSILON (programming language) Epsilon (text editor) Epsilon (rocket), a Japanese solid-fuel satellite launcher GM Epsilon platform, an automobile platform Hyundai Epsilon engine
Other uses Epsilon (wasp), a genus of wasps Hurricane Epsilon (2005) Hurricane Epsilon (2020) Lancia Epsilon, a car produced by Lancia MS Epsilon, a ROPAX ferry A subsidiary of marketing company Alliance Data SARS-CoV-2 Epsilon variant, a variant of SARS-CoV-2, the virus that causes COVID-19
See also Latin epsilon (Ԑ, ԑ), a letter of the Latin alphabet Reversed Ze (Ԑ, ԑ), a letter of the Cyrillic alphabet