| SRU | sample ratio units; side rails up; solitary rectal ulcer; structural repeating unit |
|---|---|
| SRUS | solitary rectal ulcer syndrome |
| SURS | solitary ulcer of rectum syndrome; surveillance and utilization review |
| SUS | Saybolt Universal Seconds; solitary ulcer syndrome; stained urinary sediment; suppressor sensitive |
| VU | varicose ulcer; volume unit |