| Abbreviation | Definition |
|---|---|
| HLBF | Hind Limb Blood Flow |
| HLBW | Hind Leg Bone Weight |
| HMS | Highly Migratory Species |
| HOPE | Humane Options to Prevent Euthanasia |
| HOVC | Hermann Ott Veterinary Clinic |
| HOVS | Heads of Veterinary Schools |
| HP | Healthy Pet |
| HPSCM | Hight Point Solid Color Mare |
| HS | Horse Saliva |
| HS | Horse Secretions |
| HSA | Health and Safety Authority |
| HSA | Humane Slaughter Association |
| HSAVA | Hungarian Small Animal Veterinary Association |
| HSC | Health and Safety Commission |
| HSE | Health and Safety Executive |
| HSL | Health and Safety Laboratory |
| HSNA | Humane Society of North America |
| HSOC | Humane Society of Ocean City |
| HSOC | Humane Society of Ottawa- Carleton |
| HSUS | Humane Society of the United States |