| NAPDP | National Association of Prepaid Dental Plans |
|---|---|
| NDA | National Dental Association; New Drug Application; no data available; no detectable activity; no det... |
| NDC | National Data Communications; National Drug Code; Naval Dental Clinic; nondifferentiated cell |
| NDS | Naval Dental School; neurologic deficit score; new drug submission; normal dog serum |
| NIDR | National Institute of Dental Research |