TCD can be used as:
- Chad (ISO 3-letter country code)
- Task completion date
- Teller cash dispenser
- Tentative channel designation
- Thalamocortical dysrhythmia
- The College Dropout, the debut studio album by Kanye West
- Thermal conductivity detector, used in gas chromatography
- Thousand cankers disease
- Transcranial Doppler, a blood flow test
- Transport de Chalands de Débarquement, a type of French Navy ship
- Trinity College Dublin
- The Chambers Dictionary
- T cell depletion
- Tricyclodecane, a chemical compound used as jet fuel