UDD
# UDD

UDD may refer to:

## Science and technology

* Ultra-dense deuterium
* Neutrons, which have quark configurations of udd, or up-down-down
* Ultradisperse diamond, another name for Detonation nanodiamond
* Urine-diversion dehydration toilet
* User driven development

## Others

* Uniform Distribution of Deaths, an assumption used in building actuarial life tables
* Bermuda Dunes Airport
* UDD, the station code for the Uddingston railway station in Uddingston, Scotland
* United Front for Democracy Against Dictatorship, a political movement in Thailand
* Universidad del Desarrollo private university in Chile
* Up dharma Down, a Filipino band
