| HRR | head rotation to the right; heart rate range |
|---|---|
| HS | Haber syndrome; half strength; hamstring; hand surgery; Hartmann solution; head sling; healthy subje... |
| HTS | head traumatic syndrome; HeLa tumor suppression; human thyroid-stimulating hormone, human thyroid st... |
| IHT | insulin hypoglycemia test; intravenous histamine test; ipsilateral head turning |
| LHD | lateral head displacement [sperm] |