| Abbreviation | Definition |
|---|---|
| HN | haemagglutinin neuraminidase |
| HN | haemorrhage of newborn |
| HN | head & neckusually, H&N |
| HN | head & neck–usually, H&N |
| HN | head nurse |
| HN | Health Noticeusually, Department of Health Notice or Public Health Notice |
| HN | Health Notice–usually, Department of Health Notice or Public Health Notice |
| HN | hereditary nephritis |
| HN | Heymann’s nephritis |
| HN | Heymanns nephritis |
| HNA | health needs assessment |
| HNA | heparin neutralising activity |
| HNI | Housing Needs Index |
| HNI | Human Nutrition Institute |
| HO | Hearing Officer |
| HO | Hemoccult Lab medicine, US |
| HO | heterotopic ossification |
| HO | high oxygen |
| HO | house officer |
| HO | hyperbaric oxygen |