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trench warfare
trench warfare Although trenches were used in ancient and medieval warfare, in the American Civil War, and in the Russo-Japanese War (1904-5), they did not become important until World War I. The introduction of rapid-firing small arms and artillery made the infantry charges of earlier wars virtu...
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Louis Ferdinand Céline
Louis Ferdinand Céline , 1894-1961, French author, whose real name was Louis Ferdinand Destouches. Céline wrote grim, scatological, and blackly funny novels. His first and best-known work, Journey to the End of Night (1932, tr. 1934) is based on his service at the front in World War ...
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Wallace's line
Wallace's line imaginary line postulated by A. R. Wallace as the dividing line between Asian and Australian fauna in the Malay Archipelago. It passes between Bali and Lombok islands and between Borneo and Sulawesi, then continues S of the Philippines and N of the Hawaiian Islands.
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plane
plane in mathematics, flat surface of infinite extent but no thickness. An example of a plane, or more exactly of a bounded portion of a plane, is the surface forming one face, or side, of a cube. A plane is determined, or defined, by any of the following: (1) three points not in a straight line; (...
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racquets
racquets game played by two or four persons on a court 60 by 30 ft (18.3 m by 9.1 m); it is surrounded by three walls 30 ft (9.1 m) high and a backwall 15 ft (4.6 m) high. The ball, 1 in. (2.54 cm) in diameter, is made of polyethylene with an adhesive tape cover. The gut-strung racket is 30 in. (76...
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The Tale of Gamelyn
The Tale of Gamelyn , a romance in verse, written c.1350, containing about 900 lines. It tells of the tribulations of a young man abused by his older brothers. The tale survives in 25 manuscripts of the Canterbury Tales, sometimes entitled "The Cook's Tale," though it is not by Geoffrey Chauc...
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Richard Savage
Richard Savage 1697?-1743, English poet. The now discredited story of his illegitimate descent from a noble line and of his persecutions, which are set forth in a biography by Samuel Johnson, won him a reputation that his works scarcely merited. His output includes two poems, The Bastard (1728) a...
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snow line
snow line altitude above which or latitude beyond which snow does not melt in summer (usually called the permanent snow line), or, in winter, the line to which snow extends at a given point in time. Factors affecting the location of the snow line are the quantity of snowfall, the steepness of the s...
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polar front
polar front zone of transition between polar and tropical air masses . Its average position during the winter is at about 30° lat. and during the summer at about 60° lat. In the N Atlantic Ocean, for example, the polar front can often be traced as a continuous line extending over thousands...
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airmail
airmail transport of mail by airplanes. Demonstration flights that showed the feasibility of carrying mail by air were made in Great Britain and in the United States in 1911. In the United States, after money for experimentation was appropriated by Congress in 1918, the first regular airmail servic...
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