| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Trachea ta | No definition provided | Christopher Rauch | 2023.12.01 |
| Trachoma | No definition provided | Christopher Rauch | 2023.12.01 |
| trachyandesite | An extrusive rock intermediate in composition between trachyte and andesite. | Ryan McGranaghan | 2023.04.16 |
| trachybasalt | An extrusive rock intermediate in composition between trachyte and basalt. | Ryan McGranaghan | 2023.04.16 |
| trachyte | A group of fine-grained, generally porphyritic, extrusive igneous rocks having alkali feldspar and minor mafic minerals as the main components, and possibly a small amount of sodic plagioclase. | Ryan McGranaghan | 2023.04.16 |
| Trachyte | No definition provided | Christopher Rauch | 2023.12.01 |
| Track athletics | No definition provided | Christopher Rauch | 2023.12.01 |
| Track-athletics | No definition provided | Christopher Rauch | 2023.12.01 |
| Tracks, Railroad | No definition provided | Christopher Rauch | 2023.12.01 |
| Tractarianism | No definition provided | Christopher Rauch | 2023.12.01 |
| Traction-engines | No definition provided | Christopher Rauch | 2023.12.01 |
| Tractors, Metallic | No definition provided | Christopher Rauch | 2023.12.01 |
| Tracts | No definition provided | Christopher Rauch | 2023.12.01 |
| Tract societies | No definition provided | Christopher Rauch | 2023.12.01 |
| Trade | No definition provided | Christopher Rauch | 2023.12.01 |
| Trade and professional associations | No definition provided | Christopher Rauch | 2023.12.01 |
| Trade, Balance of | No definition provided | Christopher Rauch | 2023.12.01 |
| Trade, Boards of | No definition provided | Christopher Rauch | 2023.12.01 |
| Trade-marks | No definition provided | Christopher Rauch | 2023.12.01 |
| Trademarks | No definition provided | Christopher Rauch | 2023.12.01 |