| Abbreviation | Definition |
|---|---|
| HD | House Doctor |
| HD | human ±-defensin |
| HD | human a-defensin |
| HD | human α-defensin |
| HD | Huntington's Disease |
| HD | Hyperactive Disorder |
| HDF | High Digestible Fibre |
| HDI | Host Defenses And Infection |
| HDL | High Daily Level |
| HDL-C | high-density lipoprotein cholesterol |
| HDN | Haemolytic Disease of Newborn |
| HDN | Hemolytic Disease of Newborns |
| HDOP | Hypertensive Disease Of Pregnancy |
| HDR | High Dose Rate |
| HDRF | Hope for Depression Research Foundation |
| HDS | Herniated disc syndrome |
| HDS | Hold Deprivation Syndrome |
| HDS | Hypodermic Disposal System |
| HEAL | History Exam Assessment Layout |
| HEAR | Hearing Education And Aural Rehabilitation |