TCA

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
 * Twentieth Century Animation, the animation division of 20th Century Studios

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

 * Taipei Computer Association
 * 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)
 * Transportation Corridor Agencies, a toll road authority in Orange County, California
 * Traumatic cardiac arrest, due to trauma
 * Tennant Creek Airport, IATA airport code "TCA"
 * Turks and Caicos Islands, country code