NIMH
| Acronym | Definition |
|---|---|
| NIMH | National Institute of Mental Health (US National Institutes of Health; Rockville, MD) |
| NIMH | Nickel Metal Hydride (battery technology) |
| NIMH | Nickel Metal Hybrid |
| NIMH | National Institute of Medical Herbalists |
| NIMH | National Institute of Meteorology and Hydrology |
| NIMH | Not in My House |
| NIMH | Great Britain Northern Ireland Machine (Scott Catalogue prefix; philately) |