- Transferrin
- Transformer
- Transistor
- Transitional Epithelium
- Translation
- Transpiration
- Transponder
- Transport Protein
- Transverse Plane
- Trapezius Muscle
- Trapper
- Travel
- Tree Bark
- Treponema Pallidum
- Triathlon
- Trigeminal Nerve
- Trim
- Trisomy 21 (Down Syndrome)
- tRNA
- Trophic Level
- Tropism
- Troposphere
- Trucks
- True Breeding
- Trusts
