| NN | neonatal; nevocellular nevus; normally nourished; normal nutrition; nurse's notes |
|---|---|
| nn | nerves; new name [Lat. nomen novum] |
| NN/LM | National Network of Libraries of Medicine |
| NNAS | neonatal narcotic abstinence syndrome |
| NNC | National Nutrition Consortium |
| NND | neonatal death; New and Nonofficial Drugs; nonspecific nonerosive duodenitis |
| NNDC | National Naval Dental Center |
| NNE | neonatal necrotizing enterocolitis; nonneuronal enolase |
| NNEB | National Nursery Examination Board |
| NNG | nonspecific nonerosive gastritis |