Find the word definition


UDN can stand for:

  • National Democratic Union (Brazil) (União Democrática Nacional),a political party that existed in Brazil between 1945 and 1965
  • Ulcerative dermal necrosis, a disease of salmon and trout
  • United Daily News, a Taiwanese newspaper
  • IATA airport code for Codroipo civil airport in Italy
  • Unique Device Name of the UPnP Device Architecture
  • Undiagnosed Diseases Network, an NIH-funded study of intractable medical conditions that have eluded diagnosis