Look up tau, Tau, Τ, or τ in Wiktionary, the free dictionary.

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 Manuʻa Island Group of American Samoa
• Ta'u County, a county in American Samoa
• Tau (Tongatapu), an island of the Tongatapu group in Tonga
• Tau (Haʻapai), an island of the Haʻapai 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)

See also

• Tau function (disambiguation)

This disambiguation page lists articles associated with the title Tau.
If an internal link led you here, you may wish to change the link to point directly to the intended article.