UDN
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "UDN".

UDN can stand for:

• National Democratic Union (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
• Unreal Developers Network
• IATA airport code for Codroipo civil airport in Italy.[1]

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