Encyclopedias, Almanacs, Transcripts, and Maps
- Thury, Marc (1822-1905)
- Thymaridas of Paros
- Thyrotoxic Myopathy
- Tiagabine
- Tibetan Foundation
- Tii
- Tijdschrift voor Parapsychologie
- Tillich, Paul
- Tillyard, R(obin) J(ohn) (1881-1937)
- Timaeus of Locri (ca. 400 B.C.E.)
- Time of Death
- Time Pattern Research Institute
- Time Zones
- Timemas and Stick and Leaf Insects: Phasmida
- Timofeyevich Yermak
- Timothy Bright
- Timothy M. Casey
- Timothy W. Gowers
- Tinamous and Ratites: Struthioniformes
- Tinamous: Tinamidae