TCT

• 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

• 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

• 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

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

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