Tau (disambiguation)

Tau (Τ or τ) is the 19th letter of the Greek alphabet.

Tau may also refer to:

Mathematics

 * Tau (mathematical constant), a circle constant equal to $2π$ (6.28318...)
 * Tau test in statistics (tau-a, tau-b and tau-c tests or Kendall tau rank correlation coefficient)
 * Tau function (disambiguation), several

Geography

 * Tau, Norway, a small town in Strand municipality, Rogaland county, Norway
 * Tău (disambiguation), two villages in Romania
 * Ta‘ū, an island in the Manua Island Group of American Samoa
 * Ta'u County, a county in American Samoa
 * Tau (Tongatapu), an island of the Tongatapu group in Tonga
 * Tau (Haapai), an island of the Haapai group in Tonga
 * Tau (Botswana), a village at the base of the Tswapong Hills in Botswana

Science and technology

 * TAU (spacecraft), a proposal to send a space probe to a thousand astronomical units from the Earth
 * Tau (particle), also called Tau lepton, an elementary particle in particle physics
 * Tau emerald, a species of dragonfly
 * Tau neutrino a subatomic elementary particle
 * Tau protein, a biochemical protein associated with microtubules
 * Tau, the standard astronomical abbreviation for Taurus (constellation)
 * Tau, a mutation in the Casein kinase 1 epsilon protein, in circadian biology
 * Rational Tau, a UML and SysML modeling tool
 * Opsanus tau, the scientific name for the oyster toadfish

Arts and media

 * Tau (film), a 2018 thriller film starring Maika Monroe
 * Tău (Negură Bunget album), a 2015 album by Romanian black metal band Negură Bunget
 * T'au, an alien race from Warhammer 40,000
 * Pan Tau, hero of Czech films and television series
 * Tau Zero, a novel by Poul Anderson
 * Tau Volantis, a planet shown in Dead Space 3
 * Tau Cannon, an energy weapon from the video game Half-Life
 * Tau Films, an American visual effects and animation company
 * Tau, a stellar system mentioned in the video game Warframe

Education

 * Tama Art University
 * Tel Aviv University
 * Texila American University
 * Anna University of Technology, Tiruchirappalli

People

 * Abel Tau, South African politician
 * Tebogo Tau, Botswana judge
 * Jimmy Tau, South African football (soccer) player
 * Max Tau, German-Norwegian writer, editor, and publisher
 * Nicolae Țâu, Moldovan politician who was Foreign Minister of Moldova between 1990 and 1993
 * Parks Tau, South African politician who was mayor of Johannesburg from 2011-2016
 * Tau (rapper), Polish rapper
 * Devi Lal (politician), Indian politician who was Deputy Prime Minister from 1989 to 1991

Other

 * Tau (mythology), an evil spirit in Guaraní mythology
 * Tau effect, a sensory illusion relating to the perception of space
 * Cross of Tau, a Christian symbol so called due to its resemblance to the letter Tau
 * Tourist Association of Ukraine
 * The Greek letter representing Expiration (options)