TMD
- Team Deathmatch
- Telemundo
- Temporomandibular joint dysfunction
- Texas Military Department
- The Medic Droid
- Theater missile defense
- Thorn Electrical Industries
- Tip-magnetic driving
- Tottenham Mandem
- Traction maintenance depot
- Trade Marks Directive
- Transition metal dichalcogenide monolayers
- Transmembrane domain
- Transverse momentum distributions
- Truly Madly Deeply (song)
- Tuned mass damper