| NDRI | National Disease Research Interchange |
|---|---|
| NDS | Naval Dental School; neurologic deficit score; new drug submission; normal dog serum |
| NDSB | Narcotic Drugs Supervisory Board |
| NDT | neurodevelopmental treatment; noise detection threshold; nondestructive test, nondestructive testing |
| NDTI | National Disease and Therapeutic Index |
| NDV | Newcastle disease virus |