Wikipedia
HDN
HDN may refer to
- Haemorrhagic disease of the newborn, a vitamin K deficiency
- A Hard Day's Night (disambiguation)
- Harlesden station, in England
- Hemolytic disease of the newborn, an alloimmune illness
- Home Delivery Network Limited, a British courier
- Hürriyet Daily News, a Turkish English-language daily
- Hydrodenitrogenation, an industrial chemical process
- Hyperdimension Neptunia, a 2010 video game
- Northern Haida language, an indigenous language of North America
- Philippine Human Development Network
- Yampa Valley Airport in Colorado, United States