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irrigation
(Encyclopedia)irrigation, in agriculture, artificial watering of the land. Although used chiefly in regions with annual rainfall of less than 20 in. (51 cm), it is also used in wetter areas to grow certain crops, e...tornado
(Encyclopedia)tornado, dark, funnel-shaped cloud containing violently rotating air that develops below a heavy cumulonimbus cloud mass and extends toward the earth. The funnel twists about, rises and falls, and whe...statistical mechanics
(Encyclopedia)statistical mechanics, quantitative study of systems consisting of a large number of interacting elements, such as the atoms or molecules of a solid, liquid, or gas, or the individual quanta of light ...Cotonou
(Encyclopedia)Cotonou kōtōno͞oˈ [key], city, capital of Atlantique prov., S Benin, on the Gulf of Guinea. ...geologic timescale
(Encyclopedia) CE5 geologic timescale, a chronological scale of earth's history used to measure the relative or absolute age of any part of geologic time. Of the numerous timescales, the most common is based on g...Gottwald, Klement
(Encyclopedia)Gottwald, Klement klāməntˈ gôtˈvält [key], 1896–1953, Czechoslovak Communist leader, b. Moravia. After World War I he helped found the Czechoslovak Communist party and served on the party's ce...Guadalcanal
(Encyclopedia)Guadalcanal gwädəlkənălˈ [key], volcanic island, c.2,510 sq mi (6,500 sq km), South Pacific, ...chicle
(Encyclopedia)chicle chĭkˈəl [key], name for the gum obtained from the latex of the sapodilla tree (Manilkara zapota), a tropical American evergreen. The sapodilla (known also by many other common names) is wide...Brazelton, T. Berry
(Encyclopedia)Brazelton, T. Berry (Thomas Berry Brazelton Jr.), 1918–2018, American pediatrician and author, b. Waco, Tex., grad. Princeton, 1940, College of Physicians and Surgeons, Columbia 1943. Brazelton was ...Brasília
(Encyclopedia)Brasília bräzēlˈyä [key], capital city and federal district of Brazil (2,264 sq mi/5,864 sq ...Browse by Subject
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