| Burgess shale |
Burghley, Lord |
burglar alarm |
Burgoyne, John (1722–92) |
Burgundy |
| burial metamorphism |
Buridan, John (c.1300–after 1360) |
Buridan's ass |
Buridan’s ass |
buried layer |
| buried soil |
buried topography |
Burke, Edmund (1729–97) |
Burkina Faso |
Burkitt, Denis Parsons |
| Burma |
Burma Campaigns (January 1942–August 1945) |
Burman, John Peter (1924–98) |
burn |
burn degree |
| burner reactor |
Burnet, Gilbert (1643–1715) |
Burnet, Sir Frank Macfarlane |
unipolar signal |
UNIPOL process |
| uniporter |
unipotential cathode |
UniProt |
UNIQUAC |
unique equilibrium |
| unique factorization domain |
uniquely decodable |
uniqueness assumption |
uniqueness quantifier |
unique visitor |
| Uniramia |
uniramous |
uniramous appendage |
uniserial |
unisexual |
| Unisys |
unit |
unitary matrix |
unitary ratio |
unitary semiring |
| unitary taxation |
unitary transformation |
unit cell |
unit circle |
unit cube |
| unit delta function |
unit distance |
United Arab Emirates |
United Arab Republic |
United Democratic Front |
| United Empire Loyalists |
United Federation of Labour |
United Irishmen |
United Kingdom |
United Kingdom Industrial Space Committee |
| United Kingdom Infrared Telescope |
United Kingdom Schmidt Telescope |
United Kingdom Space Agency |
United Kingdom – Disaster Monitoring Constellation-2 |
United Launch Alliance |
| United Malays National Organization |
United Nations Conference on Trade and Development |
United Nations Convention on the Rights of the Child |
United Nations Development Programme |
United Nations Educational, Scientific and Cultural Organization |
| United Nations General Assembly |
United Nations High Commissioner for Refugees, Office of the |
United Nations Office for Outer Space Affairs |
United Nations Organization |
United Nations Security Council |
| United Provinces of the Netherlands |
United Rocket and Space Corporation |
United Space Alliance |
United States Department of Agriculture |
United States Geological Survey |
| United States Microgravity Laboratory |
United States of America |
unit elasticity |
unit form |
unit-free measure |
| unit hydrograph |
unit magnetic pole |
unit matrix |
unit of account |
unit operation |
| unit root process |
units |
unit sample |
unit set |
unit square |
| unit-step function |
unit-stratotype |
unit stress |
unit testing |
unit trust |
| unit vector |
unity |
Unity module |
unity of science |
UNIVAC |
| univalent |
univariant assemblage |
universal active filter |
universal asynchronous receiver/transmitter |
universal benefit |
| Universal Character Set |
universal, concrete |
universal constant |
universal constants |
universal covering space |
| Universal Credit |
Universal Declaration of Human Rights |
universal disk format |
universal flip-flop |
universal formula |
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