| HAR | high-altitude retinopathy |
|---|---|
| HARD | hydrocephalus-agyria-retinal dysplasia [syndrome] |
| HARD | +/- E hydrocephalus-agyria-retinal dysplasia plus or minus encephalocele [syndrome] |
| HAREM | heparin assay rapid easy method |
| HARH | High Altitude Retinal Hemorrhage |
| HARH | high-altitude retinal hemorrhage |
| HARM | heparin assay rapid method |
| HARP | homeless and at-risk population |
| HARS | histidyl-RNA synthetase |
| HART | Heparin-Aspirin Reinfarction Trial [not to be confused with HAART |