SLPI
| Acronym | Definition |
|---|---|
| SLPI | Secretory Leukocyte Protease Inhibitor (saliva protein) |
| SLPI | Sri Lanka Press Institute |
| SLPI | Student Leadership Practices Inventory |
| SLPI | Southern Lakes Planning Initiative |
| SLPI | Streptomyces Lividans Protease Inhibitor (biochemistry) |