Thrombus

A clot in a blood vessel or within the heart.

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Thrush
Yeast infection of the mouth and throat, characterized by patches of white, caused by the fungus Candida albicans . Yeast are part of the normal flora in the mouth. They ordinarily do not cause symptoms. Certain conditions, such as antibiotic use, can disturb the natural balance of microorganisms in the mouth and allow the overgrowth […]
Thumb
The short thick finger situated at an angle to the other fingers so it can be opposed to the them, making it possible to pick up and hold things. The thumb is analogous in position to the big toe (the great toe) and similarly has only two phalanges (all the other digits have three).
Thymine (T)
One member of the base pair A-T (adenine-thymine) in DNA.