TCA

TCA may refer to:

In chemistry:
* Trichloroethane, organochloride solvent
* Trichloroacetic acid, chemical used to precipitate protein in serum
* TCA, an abbreviation for tricyclic antidepressant, a class of anti-depressant drugs
* TCA, or 2,4,6-trichloroanisole, a chemical compound which is the cause of cork taint in wine
* TCA cycle or citric acid cycle

In associations:
* Television Critics Association
* Total Community Action
* Trans-Canada Air Lines
* Taiwanese Cultural Association
* Train Collectors Association
* Trinity Christian Academy

In other uses:
* Advanced Telecommunications Computing Architecture, a specification set for carrier grade communications equipment
* Terminal Control Area, a volume of controlled airspace
* Teen Choice Awards