TCD can be used as:
- Chad, ISO 3-letter country code
- Teller cash dispenser
- Tentative Channel Designation
- Thalamocortical Dysrhythmia
- The College Dropout
- Trash Can Dan
- Thermal Conductivity Detector, a type of detector used in Gas Chromatography
- Transcranial Doppler, a test that measures the velocity of blood flow through the brain's blood vessels
- Transport de Chalands de Débarquement, a type of landing operation ships in commission in the French Navy.
- Trinity College, Dublin
- The Chambers Dictionary
- T cell depletion
- Total cost approach to distribution
- The Texas College Democrats, a collegiate organization in the U.S. state of Texas affiliated with the Democratic Party