| TTD | temporary total disability; tissue tolerance dose; transient tic disorder; transverse thoracic diameter; trichothiodystrophy |
|---|---|
| TTE | transthoracic echocardiography |
| TTFD | tetrahydrofurfuryldisulfide |
| TTG | T-cell translocation gene; telethermography; tellurite, taurocholate, and gelatin |
| TTGA | tellurite, taurocholate, and gelatin agar |
| TTH | thyrotropic hormone; tritiated thymidine |
| TTI | tension-time index; time-tension index; timepto-intubation; torque-time interval; transtracheal insufflation |
| TTIdi | tension time index diaphragm |
| TTIM | T-cell tumor invasion and metastasis |
| TTL | total thymus lymphocytes; transistor-transistor logic |