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cofferdam
(Encyclopedia)cofferdam, temporary barrier for excluding water from an area that is normally submerged. Made commonly of wood, steel, or concrete sheet piling (see pile), cofferdams are used in constructing the fou...Greenbelt
(Encyclopedia)Greenbelt, city (2020 pop. 24,921), Prince Georges co., W central Md., a residential suburb of Washington, D.C.; chartered 1937. Greenbelt was planned a...White, Robert Michael
(Encyclopedia)White, Robert Michael, 1924–2010, American aviator, b. New York City. A fighter pilot during World War II, he was shot down over Germany and held in a prisoner-of-war camp (Feb.–Apr, 1945); he was...gravitation
(Encyclopedia)gravitation, the attractive force existing between any two particles of matter. The term gravitygravity is commonly used synonymously with gravitation, but in correct usage a definite distinction is...SETI
(Encyclopedia)SETI sĕtˈē [key] [Search for ExtraTerrestrial Intelligence], name given to a series of independent programs to detect radio signals from civilizations beyond the solar system. Modern SETI efforts c...French Guiana
(Encyclopedia) CE5 French Guiana gēănˈə, –änˈ– [key], Fr. La Guyane française, officially Department of Guiana, French overseas department (2015 est. pop. 269,000), 35,135 sq mi (91,000 sq km), NE Sout...sewing machine
(Encyclopedia)sewing machine, device that stitches cloth and other materials. An attempt at mechanical sewing was made in England (1790) with a machine having a forked, automatic needle that made a single-thread ch...Kalam, A. P. J. Abdul
(Encyclopedia)Kalam, A. P. J. Abdul (Avul Pakir Jainulabdeen Abdul Kalam), 1921–2015, Indian scientist and political leader, studied St. Joseph's College, Tiruchirappalli (grad. 1954), Madras Institute of Technol...proper motion
(Encyclopedia)proper motion, in astronomy, apparent movement of a star on the celestial sphere, usually measured as seconds of arc per year; it is due both to the actual relative motions of the sun and the star thr...Courrèges, André
(Encyclopedia)Courrèges, André äNdrāˈ ko͞or-rĕzhˈ [key], 1923–2016, French fashion designer whose designs were especially popular and influential during the 1960s. He worked for the couturier Cristóbal B...Browse by Subject
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