The meaning of the Acronym UDD is...

UDD is

• Neutron, one up quark (u) and two down quarks (d)

More Meanings For UDD:

• Unified Design Database
• User- Defined Datatype
• Universal Data Dictionary
• Unified Data Descriptor
• Ultrafast DigiDrive
• Ultra DigiDrive
• User Defined Device
• Neutron, one up quark (u) and two down quarks (d)
• Urban Development Department
• Upper Distribution Duct
• Ultradispersive Detonational Diamond
• Bermuda Dunes Airport, Palm Springs, California

UDD is also in:

• Airport Codes
• Databases
• File Extensions
• General
• Hardware
• Military
• Physics
• Unfiled
• Universities