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mantid

(Encyclopedia) mantid or mantis, name applied to the large, slender, slow-moving, winged insects of the family Mantidae in the order Mantodea. Predatory insects, mantids have strong, elongate, spiny…

Lycopodiophyta

(Encyclopedia) LycopodiophytaLycopodiophytalīˌkōpōˌdēŏfˈətə [key], division of the plant kingdom consisting of the organisms commonly called club mosses and quillworts. As in other vascular plants,…

Chancellorsville, battle of

(Encyclopedia) Chancellorsville, battle of, May 2–4, 1863, in the American Civil War. Late in Apr., 1863, Joseph Hooker, commanding the Union Army of the Potomac, moved against Robert E. Lee, whose…

gelatin

(Encyclopedia) gelatin or animal jelly, foodstuff obtained from connective tissue (found in hoofs, bones, tendons, ligaments, and cartilage) of vertebrate animals by the action of boiling water or…

Gansu

(Encyclopedia) Gansu or Kansu Gansu both: gänˈs&oomacr;ˈ [key], province, 141,000 sq mi (365,284 sq km), NW China…

hat

(Encyclopedia) hat, headdress developed from the simple close-fitting cap and hood of antiquity. The first hat, which was distinguished as such by having a brim, was the felt petasus of the Greeks,…

Herriot, Édouard

(Encyclopedia) Herriot, ÉdouardHerriot, Édouardādwärˈ ĕryōˈ [key], 1872–1957, French statesman and man of letters. After beginning an academic career he turned to politics. A moderate leftist,…

caisson

(Encyclopedia) caissoncaissonkāˈsən, –sŏn [key] [Fr.,=big box], in engineering, a chamber, usually of steel but sometimes of wood or reinforced concrete, used in the construction of foundations or…

Yellowstone National Park

(Encyclopedia) Yellowstone National Park, 2,219,791 acres (899,015 hectares), the world's first national park (est. 1872), NW Wyo., extending into Montana and Idaho. It lies mainly on a broad plateau…

3D printer

(Encyclopedia) 3D printer, computerized device that produces a three-dimensional object by creating it as a series of thin layers. The object is created from a model stored in computer-aided design…