| treuil | winch |
| Trevelín | Trevelín |
| Treviglio | Treviglio |
| Treviso | Treviso |
| Trevor | Trevor |
| Trevor Berbick | Trevor Berbick |
| Trevor Pinnock | Trevor Pinnock |
| Trey Parker | Trey Parker |
| Treycovagnes | Treycovagnes |
| Treytorrens | Treytorrens |
| Treyvaux | Treyvaux |
| Trezoi | Trezoi |
| Trešnjevac | Trešnjevac |
| Trgovište | Trgovište |
| Tri comptage | Counting sort |
| Tri de Shell | Shell sort |
| Tri fusion | Merge sort |
| Tri par base | Radix sort |
| Tri par insertion | Insertion sort |
| tri- | tri- |
| Tri-Nations | Tri Nations |
| Tri-Nations de rugby à XIII | Rugby League Tri-Nations |
| tri-unité | triunity |
| Triacanthidae | Triacanthidae |
| Triacontaèdre rhombique | Rhombic triacontahedron |
| triade | trinity |
| Triades chinoises | Triad society |
| Triades galloises | Welsh Triads |
| Triadobatrachus | Triadobatrachus |
| triage | sorting |
| Triaki-icosaèdre | Triakis icosahedron |
| Triakidae | Hound sharks |
| Triakioctaèdre | Triakis octahedron |
| Triakitétraèdre | Triakis tetrahedron |
| triangle | triangle |
| Triangle austral | Triangulum Australe |
| Triangle d'hiver | Winter Triangle |
| Triangle d'été | Summer Triangle |
| Triangle de Héron | Heronian triangle |
| Triangle de Kobon | Kobon triangle problem |
| Triangle de Penrose | Penrose triangle |
| triangle de présignalisation | warning triangle |
| triangle de Reuleaux | Reuleaux triangle |
| Triangle de Sierpinski | Sierpinski triangle |
| triangle de Sierpiński | Sierpinski triangle |
| Triangle de Weimar | Weimar Triangle |
| Triangle des Bermudes | Bermuda Triangle |
| Triangle Mineiro | Triângulo Mineiro |
| Triangle noir | Black triangle |
| triangle rectangle | right triangle |
| Triangle rose | Pink triangle |
| triangle scalène | scalene triangle |
| triangle équilatéral | equilateral triangle |
| triangulaire | triangular |
