| UI | the Turkic language spoken by the Uigur people |
|---|---|
| UI | a member of a Turkic people of Chinese Turkestan and neighboring areas (formerly of Mongolia and eastern Turkestan) |
| UI | the Turkic language spoken by the Uigur people |
| UI | a member of a Turkic people of Chinese Turkestan and neighboring areas (formerly of Mongolia and eastern Turkestan) |
| UI | a variety of dinocerate |
| UI | an extinct family of Dinocerata |
| UI | type genus of the Uintatheriidae |