- Trachea: The largest conducting airway, also known as the windpipe.
- Transcription: The process of synthesizing messenger RNA (mRNA) from DNA.
- Translation: The process of synthesizing an amino acid sequence (protein product) from the messenger RNA code.
- Tympanic Membrane: The ear drum.
- Tympanostomy Tube: Also known as myingotomy or ear tube, a device designed to equalize pressure between the middle ear and the outside atmosphere, and used as treatment of chronic otitis media.