| Acronym | Definition |
|---|
| HECA➣Healthy Environments for Children Alliance (World Health Organization) |
| HECA➣Higher Education Consultants Association (est. 1997) |
| HECA➣Higher Education Cooperation Act (Illinois) |
| HECA➣Home Energy Conservation Association (now Carbon Action Network; UK) |
| HECA➣Higher Education Copying Accord (UK) |
| HECA➣Horn, East and Central Africa |
| HECA➣Hyperbaric Environmental Control Assembly |
| HECA➣Harpoon Environmental Correction Aid |