In some gastropod (Gastropoda) shells, an indentation or channel that accommodates the siphon.
Siphonal canal
- Tecumseh (1768–1813)
- TED
- tee circuit
- tee-pi (T-π) transform
- teergrube
- teeth
- Teflon
- Teflon cloth
- tegeminal plates
- tegmen
- tegmentum
- Teheran Conference (28 November–1 December 1943)
- TEI
- Teichichnus
- Teichmann test
- Teide Observatory
- teilchron
- Teilhard de Chardin, Pierre (1881–1955)
- teilzone
- Teisserenc de Bort, Léon Philippe
- Te Kooti Rikirangi Te Turuki (1830–93)
- tektite
- tektites
- telebanking
- telecommunications