| Acronym | Definition |
|---|
| IHMA | International Hologram Manufacturers Association |
| IHMA | International Harbour Masters' Association |
| IHMA | International Hyperbaric Medical Association |
| IHMA | Immaculate Heart of Mary Academy |
| IHMA | International Health Management Associates, Inc. |
| IHMA | Indian Homeopathic Medical Association (India) |
| IHMA | Internet Health Maintenance Association |
| IHMA | Israel Hotel Managers Association |
| IHMA | International Housewares Manufacturers Association |
| IHMA | International Holistic Medical Association (antimicrobial drug development; various locations) |
| IHMA | Islamic Homoeopathic Medical Association |