PNEI
| Acronym | Definition |
|---|---|
| PNEI | Psycho-Neuro-Endocrino-Immunology (publication) |
| PNEI | Pacific Northwest Earthquake Information (see also Pacific Northwest Seismic Network; University of Washington) |
| PNEI | Percutaneous Intranodular Ethanol Injection (endocrinology) |