| Acronym | Definition |
|---|
| TCA | Turks and Caicos Islands (ISO Country code) |
| TCA | Trichloroacetic Acid (CAS Number 76-03-9) |
| TCA | Tricarboxylic Acid |
| TCA | Television Critics Association |
| TCA | Telecommunications Association |
| TCA | Trichloroethane |
| TCA | Tricyclic Antidepressant |
| TCA | Truckload Carriers Association |
| TCA | Tennessee Code Annotated (Tennessee Statutory Law) |
| TCA | Tilt-Up Concrete Association |
| TCA | Tile Council of America (now Tile Council of North America) |
| TCA | Transaction Cost Analysis |
| TCA | Temporary Cash Assistance |
| TCA | Transportation Corridor Agencies (toll road administration, Orange County, California) |
| TCA | Trans Canada Airlines |
| TCA | Traffic Conditioning Agreement (Natural Microsystems) |
| TCA | Train Collectors Association |
| TCA | Tucson, Arizona (border patrol sector) |
| TCA | Telecommunications Act of 1996 |
| TCA | The Classical Academy |
| TCA | Threshold Crossing Alert (SONET) |
| TCA | Texas Culinary Academy (Austin, Texas) |
| TCA | Trading Community Architecture (Oracle) |
| TCA | Telecommunications Computing Architecture (Initiative from PICMG to create standardized specs for next generation carrier) |
| TCA | Terminal Control Area |
| TCA | Trinity Christian Academy |
| TCA | Texas Counseling Association |
| TCA | Transformational Communications Architecture (military space systems) |
| TCA | Total Cost of Acquisition |
| TCA | Trichlorethane |
| TCA | Transluminal Coronary Angioplasty |
| TCA | Time of Closest Approach |
| TCA | The Commercial Appeal (newspaper, Memphis, TN) |
| TCA | Tasmanian Cricket Association |
| TCA | Tarlac College of Agriculture (Camiling, Tarlac, Philippines) |
| TCA | Trainer/Cargo Aircraft (NATO) |
| TCA | Take Charge America, Inc |
| TCA | 2,4,6-Trichloroanisol |
| TCA | Texas Chess Association |
| TCA | Tissue Culture Association |
| TCA | Traditional Cost Accounting |
| TCA | Thrust Chamber Assembly (main combustion chamber and the nozzle of a rocket engine) |
| TCA | Transport Canada Aviation |
| TCA | Texas Cotton Association (Dallas, TX) |
| TCA | Terminal Controlled Airspace |
| TCA | Texas Common Application |
| TCA | Temple Christian Academy (various locations) |
| TCA | Task Control Area (CICS) |
| TCA | Topology Change Acknowledgement (Cisco) |
| TCA | Terms and Conditions Agreement |
| TCA | Threshold Crossing Alarm |
| TCA | Testing and Certification Australia |
| TCA | Tax Credit Amount |
| TCA | Technical Cooperation Agency |
| TCA | Trailer Coach Association |
| TCA | Tactical Control Assistant (US Army) |
| TCA | Transfer Cluster Allowed (ANSI) |
| TCA | 1-1-1-Tetrachloroethane |
| TCA | Thomas C. Adams (British estate agents) |
| TCA | Thoroughbred Charities of America, Ltd |
| TCA | Track and Clue Awareness |
| TCA | Traffic Control Area |
| TCA | Traffic Control Airport |
| TCA | The Cats Ass (gaming clan) |
| TCA | Tuscola County Advertiser (Michigan newspaper) |
| TCA | Track Continuity Area |
| TCA | Thermal Critical Assembly |
| TCA | Telephone Cleansing Australia |
| TCA | Tower Controlled Airspace (FAA) |
| TCA | Television Consumer Audit |
| TCA | Tank, Compressed Air |
| TCA | Technology Centres Australia (Coffs Harbour, NSW, Australia) |
| TCA | Teaching Company Associates |
| TCA | Title Council of America (Princeton, NJ) |
| TCA | Three Character Acronym |
| TCA | Transportation Control Agency |
| TCA | Thumb Cattlemen's Association (thumb area of Michigan) |
| TCA | Transit Case Assembly |
| TCA | Tubing-Casing-Annulus |
| TCA | Traditional COCOM Activities |
| TCA | Therma Choice Ablation |
| TCA | Transcon Airlines |
| TCA | Track Crossing Altitude |
| TCA | TransCon Airlines (fictional) |
| TCA | Target Crossing Angle |
| TCA | TRADOC Contracting Agency |
| TCA | Turkish Contractor Association |
| TCA | Tilted-Coil Antenna |