- transparentSee-through, clear; having the property that light passes through it almost undisturbed, such that one can see through it clearly.
- transvestiteA person who sometimes wears clothes traditionally worn by and associated with the opposite sex; typically a male who cross-dresses occasionally by habit or personal choice.
- traverseA route used in mountaineering, specifically rock climbing, in which the descent occurs by a different route than the ascent.
- transpirationThe loss of water by evaporation in terrestrial plants, especially through the stomata; accompanied by a corresponding uptake from the roots.
- transpireTo give off (vapour, waste matter etc.); to exhale (an odour etc.).
- TransnistriaA former governorate of Romania during World War II, established in 1941 and captured by Soviet forces in 1944.
- transduceTo convert energy from one form to another.
- tralineateTo deviate; to stray; to wander.
- transfretationa passage over a strait of narrow sea
- transhumanceThe seasonal movement of grazing livestock (especially cattle, sheep, or goats) to new pastures which may be quite distant; alpine and nonalpine versions of such movement exist.
- tregetourA magician or juggler; a trickster.