| Theora | Theora |
| Theorie | Teorie |
| Theorie quantique des champs | Kvantová teorie pole |
| Theotokos | Theotokos |
| Theridiidae | Snovačkovití |
| Therizinosaurus | Therizinosaurus |
| thermistance | termistor |
| Thermite | Termiti |
| Thermochimie | Termochemie |
| Thermoconvection | Tepelná vodivost |
| thermodynamique | termodynamika |
| thermomètre | teploměr |
| thermos | termoska |
| thermosphère | termosféra |
| thermostat | termostat |
| Thermoélectricité | Termoelektrický jev |
| Theropoda | Theropoda |
| Thersandre | Thersandros |
| Thessalie | Soluň |
| Thessalonique | Soluň |
| Theta Eridani | Acamar |
| Thick as a Brick | Thick as a Brick |
| Thierry | Dětřich |
| Thierry Henry | Thierry Henry |
| Thimbu | Thimphu |
| Thimphou | Thimphu |
| Thimphu | Thimphu |
| Thin Lizzy | Thin Lizzy |
| Thing | Thing |
| Thingol | Elwë |
| Think tank | Think tank |
| Thollar | Slovinský tolar |
| Thomas | Tomáš |
| Thomas a Kempis | Tomáš Kempenský |
| Thomas Abbt | Thomas Abbt |
| Thomas Alva Edison | Thomas Alva Edison |
| Thomas Anders | Thomas Anders |
| Thomas Becket | Tomáš Becket |
| Thomas Burke | Tom Burke |
| Thomas d'Aquin | Tomáš Akvinský |
| Thomas de Savoie-Carignan | Tommaso Francesco di Savoia |
| Thomas d’Aquin | Tomáš Akvinský |
| Thomas Edison | Thomas Alva Edison |
| Thomas Edward Lawrence | Thomas Edward Lawrence |
| Thomas Gainsborough | Thomas Gainsborough |
| Thomas Gray | Thomas Gray |
| Thomas Hardy | Thomas Hardy |
| Thomas Henry Huxley | Thomas Henry Huxley |
| Thomas Hobbes | Thomas Hobbes |
| Thomas Hunt Morgan | Thomas Morgan |
| Thomas Jefferson | Thomas Jefferson |
| Thomas Jonathan Jackson | Thomas Stonewall Jackson |
| Thomas Klestil | Thomas Klestil |
| Thomas Malory | Thomas Malory |
| Thomas Malthus | Thomas Robert Malthus |
| Thomas Mann | Thomas Mann |
| Thomas Merton | Thomas Merton |
| Thomas More | Thomas More |
| Thomas Muster | Thomas Muster |
| Thomas Münzer | Thomas Müntzer |
| Thomas Paine | Thomas Paine |
