| NO | narcotics officer; nitric or nitrous oxide; none obtained; nonobese; nurse's office |
|---|---|
| No | nobelium |
| No, no | number [Lat. numero] |
| NO3 | 질산성산소 |
| NOA | National Optometric Association |
| NOABX | no antibiotics |
| NOAEL | no observed adverse effect level |
| NOAPP | National Organization of Adolescent Pregnancy and Parenting |
| NOBT | nonoperative biopsy technique |
| NOC | not otherwise classified |