| SD | Sandhoff disease; senile dementia; septal defect; serologically defined; serologically detectable; s... |
|---|---|
| US | screen unsharpness ultrasonic, ultrasound; ultrasonography; unconditioned stimulus; unique sequence;... |
| UTS | Ullrich-Turner syndrome; ulnar tunnel syndrome; ultimate tensile strength |
| XX | double strength; female chromosome type |