HMD
- 5,10-Methenyltetrahydromethanopterin hydrogenase
- A-Hmao language
- HD Hyundai Mipo
- HMD Global
- HMD Motorsports
- Hammond station (Louisiana)
- Hampden Park railway station
- Havo voor Muziek en Dans
- Hazira Manufacturing Division
- Head-mounted display
- Heard Island and McDonald Islands
- Heavy metal detoxification
- Helmet-mounted display
- Hepatic microvascular dysplasia
- Her Majesty's Dockyard
- Hereditary mucoepithelial dysplasia
- Hexamethylenediamine
- Hoof and mouth disease
- Human Mortality Database
- Hyaline membrane disease
- Hyundai Automotive South Africa
- Institute of Human Behaviour and Allied Sciences
- List of airline codes (C)
- Ḥ-M-D