Encyclopedias, Almanacs, Transcripts, and Maps
- tree surgery
- tree toad
- Treece, Henry
- treehopper
- Trelleborg
- trematode
- Trenck, Franz, Freiherr von der
- Trends in Drug Use
- Trent Canal
- trepang
- Tres Marías, Las
- Tresco
- Trevelyan, Sir Charles Edward
- Treves
- Trevor-Roper, Hugh Redwald, Baron Dacre of Glanton
- Triangle Waist Company
- Tribal Areas
- Triborough Bridge
- tricarboxylic acid cycle
- Trichet, Jean-Claude