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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