positron emission tomography正电子发射断层照相术- unitary
- United States Pharmacopeia
- Unitensen
- uniterminal
- univalence
- univalent
- univitelline
- unmedullated
- unmyelinated
- unorganized
- unorientation
- unphysiologic
- unrest
- unsaturated
- Unschuld's sign
- unsex
- unstriated
- Unverricht's disease(syndrome)
- upsiloid
- upsilon
- uptake
- urachal
- urachovesical
- urachus
- uracil