PSII
| Acronym | Definition |
|---|---|
| PSII | Plasma Source Ion Implantation |
| PSII | Posterior Segment Intraocular Inflammation (cell disorder) |
| PSII | Preventive Services Improvement Initiative (National Assembly on School-Based Health Care) |
| PSII | Process Safety Incident Investigation (industrial safety) |
| PSII | Physical Sciences Information Infrastructure (US Department of Energy) |