UISS
| Acronym | Definition |
|---|---|
| UISS | Uppsala International Summer Session (Swedish language courses) |
| UISS | Urinary Incontinence Severity Score |
| UISS | Union of Islamic Student Societies |
| UISS | United Iroquois Shared Services (Iroquois Healthcare Association; New York) |
| UISS | UCLA (University of California, Los Angeles) Integrated Staging System (kidney cancer survival predictor) |