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STP

(Encyclopedia)STP or standard temperature and pressure, standard conditions for measurement of the properties of matter. The standard temperature is the freezing point of pure water, 0℃ or 273.15K. The standard...

barn

(Encyclopedia)barn, abbr. b, in physics, unit of nuclear cross section, i.e., the effective target presented by a nucleus for collisions leading to nuclear reactions; it is equal to 10−24 square centimeters. The ...

equivalent weight

(Encyclopedia)equivalent weight. The equivalent weight of an element or radical is equal to its atomic weight or formula weight divided by the valence it assumes in compounds. The unit of equivalent weight is the a...

symmetry, biological

(Encyclopedia)symmetry, biological, similarity or balance between parts of an organism so that when a straight cut is made through a point or along a line, equal, mirror-image halves are formed. Symmetry in body sh...

Abhisit Vejjajiva

(Encyclopedia)Abhisit Vejjajiva äpēˈsĭt wāchäˈchēwä [key], 1964–, Thai politician, prime minister of Thailand (2008–11), b. Newcastle, England. Born into a wealthy Thai-Chinese family, Abhisit was educ...

lottery

(Encyclopedia)lottery, scheme for distributing prizes by lot or other method of chance selection to persons who have paid for the opportunity to win. The term is not applicable when lots are drawn without payment b...

savings bank

(Encyclopedia)savings bank, financial institution that, until recently, performed only the following functions: receiving savings deposits of individuals, investing them, and providing a modest return to its deposi...

Sebastian

(Encyclopedia)Sebastian, 1554–78, king of Portugal (1557–78), grandson and successor of John III. He was under the regency first of his grandmother (until 1562) and then of his uncle Henry (a cardinal and later...

Niagara Falls, waterfall, United States and Canada

(Encyclopedia)Niagara Falls, in the Niagara River, W N.Y. and S Ont., Canada; one of the most famous spectacles in North America. The falls are on the international line between the cities of Niagara Falls, N.Y., a...

Eastman, Joseph Bartlett

(Encyclopedia)Eastman, Joseph Bartlett, 1882–1944, U.S. government administrator, b. Katonah, N.Y. President Wilson appointed him in 1919 to the Interstate Commerce Commission. As federal coordinator of railroads...