| Abbreviation | Definition |
|---|---|
| HST | Hypertrophy Specific Training |
| HSV | Herpes simplex virus |
| HSVI | Herpes Simplex Virus Type 1 |
| HT | Heart |
| HT | Helium Talking |
| HT | High Temper |
| HT | Historical Temperament |
| HT | Hospital Treatment |
| HT | Hypertension |
| HT | Hyper-Thyroidism |
| HTH | High Test Hypochloride |
| HTLV-I | Human T-cell lymphotropic virus types I |
| HTLVIII | human T cell lymphotropic virus type III |
| HTN | Hypertension |
| HTO | Hexadecyl Tetradecenoyl Octadecanoate |
| HTP | Helps The Pain |
| HUB | Hairy Under Bottom |
| HUB | Helps U Barf |
| HUB | Human Underwater Breathing |
| HUS | Hemolytic Uremic Syndrome |