| Trituration | Squash |
| Triturus | Triturus |
| Triturus carnifex | Great Crested Newt |
| Triturus montandoni | Carpathian Newt |
| Triturus vittatus | Banded Newt |
| Triumph | Triumph Motorcycles |
| Triumph Motor Company | Triumph Motor Company |
| Triumph-Palace | Triumph-Palace |
| triumvirat | triumvirate |
| triunité | triunity |
| Triuridaceae | Triuridaceae |
| trivial | trite |
| Trivial Pursuit | Trivial Pursuit |
| Triviidae | Triviidae |
| TRIZ | TRIZ |
| trièdre | trihedron |
| trié sur le volet | select |
| Triéthylamine | Triethylamine |
| TRKI | TORFL |
| Trnava | Trnava |
| Tro Breizh | Tro Breizh |
| Troade | Troad |
| trobairitz | troubadour |
| troc | swap |
| trocart | trocar |
| trochanter | trochanter |
| trochaïque | trochaic |
| Trochidae | Trochidae |
| Trochilidae | Hummingbird |
| Trochodendrales | Trochodendrales |
| Trochophore | Trochophore |
| trochée | trochee |
| Trockau | Trockau |
| Trockenbeerenauslese | Trockenbeerenauslese |
| Trodena | Truden |
| Trofa | Trofa |
| Trofim Denissovitch Lyssenko | Trofim Lysenko |
| Trogen | Trogen |
| Trogidae | Trogidae |
| Trogir | Trogir |
| troglodyte | troglodyte |
| troglodyte de Caroline | Carolina wren |
| Troglodytes | Troglodytes |
| Trogopterus | Complex-toothed flying squirrel |
| Trogue Pompée | Gnaeus Pompeius Trogus |
| Troie | Troy |
| Troinex | Troinex |
| trois | three |
| Trois anneaux des Elfes | Three Rings |
| Trois bombes ont explosé à New Delhi | Explosions rock New Delhi marketplace |
| Trois Couleurs | Three Colours |
| Trois Enterrements | The Three Burials of Melquiades Estrada |
| Trois Gorges | Three Gorges |
| trois heures | three o'clock |
| Trois hommes dans un bateau | Three Men in a Boat |
| Trois Hommes et un bébé | Three Men and a Baby |
| Trois Hommes et un couffin | Trois hommes et un couffin |
| Trois Jours de La Panne | Three Days of De Panne |
| Trois lois de la robotique | Three Laws of Robotics |
| Trois monts Dewa | Three Mountains of Dewa |
