| u cephei ... Ubi-Ogazu |
| Ubico (Castaneda), Jorge ... Udrem Zom, Mount |
| Udrzal, Frantisek ... Ugresic, Dubravka |
| Ugrian ... Ukin-zer |
| ukiyo-e ... Ulfilas |
| Ulgen ... Ulster Volunteer Force |
| Ulster, Hugh de Lacy, earl of ... ultraviolet radiation |
| ultraviolet radiation injury ... umbo |
| umbra ... umu |
| Umuahia ... uncus |
| Undaria ... undine |
| undisclosed agency ... unifacial tool |
| unification ... Union |
| Union ... Union, Council of |
| Union, Decree of ... United Airlines |
| United All-England XI ... United Kingdom, flag of the |
| United Kingdom, history of ... United Nations Research Institute for Social Development |
| United Nations Special Committee on Palestine ... United States Coast Guard Academy |
| United States Commission of Fish and Fisheries ... United States v. Georgia |
| United States v. Harris ... universal egoism |
| Universal Exposition ... university extension |
| university laboratory ... Unter den Linden |
| Unterelbe River ... uplift |
| uplink ... Uppland, law of |
| Uppman, Theodor ... uranium |
| Uranium City ... urban realism |
| Urban Reform Law ... Urewera National Park |
| Urey, Harold C. ... Urodela |
| urogenital cloaca ... Urubamba River |
| Urucuia ... Usk, River |
| Uskoks ... Utagawa Toyohiro |
| Utagawa Toyokuni ... Utrecht |
| Utrecht Psalter ... Uzbek |
| Uzbek khanate ... |
|
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