| Acronym | Definition |
|---|
| MHD | Magnetohydrodynamic (conversion; nuclear energy) |
| MHD | Micro Hybrid Drive |
| MHD | Malteser Hilfsdienst (medical help organization) |
| MHD | Multi Head Disk |
| MHD | Moving Head Disk |
| MHD | Mestska Hromadna Doprava (Czech Republik) |
| MHD | Massachusetts Highway Department |
| MHD | Mindesthaltbarkeitsdatum (German: Best Before; food labeling) |
| MHD | Mental Health Day |
| MHD | Medium Human Development |
| MHD | Mental Health Directorate (various locations) |
| MHD | Methodist Health System |
| MHD | Minnesota Health Department |
| MHD | Mashhad, Iran (Airport Code) |
| MHD | My Heart's Desire (various organizations) |
| MHD | Military History Detachment |
| MHD | Matt Hotch Designs (Fullerton, CA) |
| MHD | Mad House Designs |
| MHD | Movimento Humanismo e Democracia (Brazil) |
| MHD | Movimento Humanista Democrático (Portuguese: Humanist Democratic Movement; Portugal and Brazil) |
| MHD | Miejski Handel Detaliczny (food distributor in Poland) |
| MHD | Matratzenhorchdienst (German slang humor: sleeping) |
| MHD | Metal Home Digest |
| MHD | Moving-Head Disk |
| MHD | Mulberry Heart Disease |
| MHD | Medical Holding Detachment |
| MHD | Maritime Homeland Defense |
| MHD | Minimum Hemolytic Dose |
| MHD | Multiple-Hyperplane Detector |
| MHD | Metering Head Differential |