| Trizeratops | triceratops |
| Triceratops | triceratops |
| Trizeps | triceps |
| Trinitatis | Trinity Sunday |
| Tribrachys | tribrach |
| Trigraph | trigraph |
| Iterator | iterator |
| Trematode | trematode |
| ekzematös | eczematous |
| Trialis | trial |
| Tribeca | Tribeca |
| Trient | Trento |
| Triest | Trieste |
| Trimaran | trimaran |
| Trinkrohr | drinking straw |
| Triptoton | triptote |
| Triton | Triton |
| Trias | Triassic |
| Tridecan | tridecane |
| Trier | Trier |