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center of mass

(Encyclopedia)center of mass, the point at which all the mass of a body may be considered to be concentrated in analyzing its motion. The center of mass of a sphere of uniform density coincides with the center of t...

Northwest Angle

(Encyclopedia)Northwest Angle, point of land, c.123 sq mi (319 sq km), N Minnesota, the northernmost point of the coterminous United States and the only place in the United States, outside of Alaska, N of the 49th ...

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...

aerial and satellite photography

(Encyclopedia)aerial and satellite photography, technology and science of taking still or moving-picture photographs from a camera mounted on a balloon, airplane, satellite, rocket, or spacecraft. In the 19th cent....

Kuril Islands

(Encyclopedia)Kuril Islands kyo͝orˈēlz, kyo͝orēlzˈ [key], Jap. Chishima-Retto, Rus. Kurilskiye Ostrova, island chain, c.6,020 sq mi (15,590 sq km), Sakhalin region, E Russia. They stretch c.775 mi (1,250 km) ...

oryx

(Encyclopedia)oryx ôrˈĭks [key], name for several small, horselike antelopes, genus Oryx, found in deserts and arid scrublands of Africa and Arabia. They feed on grasses and scrub and can go without water for lo...

Mahan, Dennis Hart

(Encyclopedia)Mahan, Dennis Hart, 1802–71, American soldier and educator, b. New York City; father of Alfred Thayer Mahan. He graduated (1824) from West Point, and from that year until 1871, except for four years...

baccarat

(Encyclopedia)baccarat bäˈkəräˌ, băkˈ–, Fr. bäkäräˈ [key], French card game formerly widely played in European casinos but now supplanted in popularity by chemin de fer. The banker plays against the ha...

Westmoreland, William Childs

(Encyclopedia)Westmoreland, William Childs, 1914–2005, U.S. general, b. Spartanburg co., S.C. He graduated from West Point in 1936 and fought with distinction in North Africa and Europe during World War II and la...

lace

(Encyclopedia)lace, patterned openwork fabric made by plaiting, knotting, looping, or twisting. The finest lace is made from linen thread. Handmade laces include needlepoint and bobbin lace, tatting, crochet work, ...