TCA may refer to: Chemistry and biochemistry Toxin complex a, an insecticidal toxin complex produced by Photorhabdus luminescens bacteria Tricarboxylic acid cycle, an alternate name for the citric acid cycle pathway in cellular metabolism Trichloroacetic acid, chemical used to precipitate protein in serum 2,4,6-Trichloroanisole, cause of cork taint in wine Tricyclic antidepressant, a class of medications TCA, a codon for the amino acid serine Culture and media Taiwanese Cultural Association Tekeyan Armenian Cultural Association, a network of Armenian cultural organisations Television Critics Association The Canadian Amateur, radio amateur magazine Tribune Content Agency, a syndication company owned by Tribune Publishing Triple Crown of Acting is a term used in the American entertainment industry to describe actors who have won a competitive Academy Award, Emmy Award, and Tony Award in the acting categories Economics and finance Transaction cost analysis Total cost of acquisition True cost accounting Education The Classical Academy (Colorado), Colorado Springs, US Trinity Christian Academy (Deltona, Florida), US Trinity Christian Academy (Jackson, Tennessee), US Organizations The Consulting Association Total Community Action Trans-Canada Air Lines, predecessor to Air Canada Train Collectors Association Transportes Carga Aérea, a defunct Brazilian airline Politics Taiwan Constitution Association, a political party in Taiwan EU–UK Trade and Cooperation Agreement, between the UK and the EU (2020) The Competition Authority (Ireland) (2002–2014) Other uses Terminal control area, a volume of controlled airspace Topology change acknowledgement, a message in the 802.1D Spanning Tree Protocol (STP) Traumatic cardiac arrest, due to trauma Tennant Creek Airport, IATA airport code "TCA"