TCT may refer to:

Science and technology

  • Alfa Romeo TCT, a twin-clutch transmission made by FPT Industrial
  • Teenage Cancer Trust, a British charity organization
  • Thrombin clotting time, a test used in blood coagulation
  • Tocotrienol, a group of four isomers occurring in Vitamin E
  • True crystallization temperature, the temperature at which salt crystals begin to crystallize from a solution
  • The Coroner's Toolkit, a suite of computer forensic software
  • Tungsten carbide-tipped, hardened metal used for example in an annular cutter or drill bit
  • TCT, a codon for the amino acid Serine

Transportation

  • Tate's Cairn Tunnel, a Hong Kong tunnel
  • Texas City Terminal Railway, a 32-mile-long railroad
  • Trans Canada Trail, a proposed trail that would stretch across Canada
  • Tung Chung Terminal, a Hong Kong gondola lift station of Ngong Ping 360

Arts and media

  • The Catholic Transcript, a Catholic paper in Hartford, Connecticut, United States
  • The Catholic Thing, a Catholic online publication
  • TCT (band), a Finnish band
  • Tri-State Christian Television, a Christian cable television network broadcasting in the US and Canada (formerly known as Total Christian Television)
  • Tucker Carlson Tonight, the eponymous talk show of conservative political commentator and author Tucker Carlson which aired on Fox News from 2016 until 2023.
  • The Campaign Trail, a game created by Dan Bryan

Other uses

  • Touring Club de Tunisie, a member of the Fédération Internationale de l'Automobile