| Abbreviation | Definition |
|---|---|
| NAACLS | National Accreditation Agency for Clinical Laboratory Sciences |
| NAACLS | National Accrediting Agency for Clinical Laboratory Sciences |
| NAAT | nuclear acid augmentation test |
| NAAT | Nucleic Acid Amplification Test |
| NAAT | Nucleic acid amplification testing |
| NAAT | nucleic acid amplification tests |
| NAB | Neutralizing Antibody |
| NAC | N-acetylcysteine |
| NACL | North American Coating Laboratories |
| NACL | North American Cultural Laboratory |
| NAGMA | Non Ion Gap Metabolic Acidosis |
| NAIL | National Association of Independent Laboratories |
| NAL | Naktuinbouw Authorized Laboratories |
| NAL | Natio Aerospace Laboratories |
| NAL | Natio Aerothermochemistry Laboratory |
| NAL | National Aerospace Laboratory |
| NAL | Natural Assets Laboratory |
| NAL | Nutrition Assessment Laboratory |
| NaOH | sodium hydroxide |
| NARL | National Agricultural Research Laboratories |