| Abbreviation | Definition |
|---|---|
| HAT | Hypoxanthine, Aminopterin, Thymidine |
| HAT | Hinte Anderson Trail |
| HAT | Hepatic Artery Thrombosis |
| HATS | High Achieving Talented Student |
| HAV | Hand- Arm Vibration |
| HAV | High Altitude Vehicle |
| HAVA | Help America Vote Act of 2002 |
| HAVC | Headwaters Action Video Collective |
| HAWT | Health And Welfare Trust |
| HAZ | Height for Age Z |
| HAZMAT | Hazardous Materials |
| HBA | Host Bus Adapter |
| HBA1C | Hemoglobin A1c - Used For Monitoring Blood Glucose |
| HBD | 2-HydroxyButyrate Dehydrogenase |
| HBEC | Human Brain Endothelial Cell |
| HBF | Hepatic blood flow |
| HBF | Hand Blood Flow |
| HBF | Hemispheric Blood Flow |
| HBF | Hypothalamic Blood Flow |
| HBGM | Home Blood Glucose Monitoring |
| HBM | Hybrid Bilayer Membrane |
| HBMEC | Human Brain Microvascular Endothelial Cell |
| HBMS | Human Bone Marrow Stromal |
| HBNP | Human Brain Natriuretic Peptide |
| HBOA | Hydroxy-1,4-BenzOxAzin-3-one |
| HBOC | Hereditary Breast and Ovarian Cancer |
| HBOMGC | Hopkins Business Of Medicine Graduate Certificate |
| HBP | High blood pressure |
| HBP | Heartbeat Period |
| HBr | HydroBromic acid |
| HBS | Hospital Based Specialist |
| HBsc | Honors Bachelor of Sciences Degree |
| HBSC | Hematopoietic Blood Stem Cell |
| HBT | Heflex Bioengineering Test |
| HBT | Human Brain Thromboplastin |
| HBV | Hepatitis B virus |
| HBW | Hang Bus and Wait |
| HBW | Handbook of the Birds of the World |
| HC | High Court |
| HC | Houses of Commons |
| HC | High Counciler |
| HC | Hard Charger |
| HC | Highly Commended |
| HC | Hybrid Computer |
| HC | Hand Controller |
| HC | Heart Catheterization |
| HC | Heart Cycle |
| HC ACE | Hydrocortisone Acetate |
| HC BUT | Hydrocortisone Butyrate |
| HC CYP | Hydrocortisone Cypionate |