| 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) |