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Bonneville Dam

(Encyclopedia)Bonneville Dam bŏnˈəvĭl [key], one of the major dams on the Columbia River where it passes through the Cascade Mts., between Oregon and Wash. The dam, 2,690 ft (820 m) long and 197 ft (60 m) high,...

dentition

(Encyclopedia)dentition, kind, number, and arrangement of the teeth of humans and other animals. During the course of evolution, teeth were derived from bony body scales similar to the placoid scales on the skin of...

axolotl

(Encyclopedia)axolotl ăkˈsəlŏtˌəl [key], a salamander, Ambystoma mexicanum, found in certain lakes in the region of Mexico City, which reaches reproductive maturity without losing its larval characteristics. ...

Buryat Republic

(Encyclopedia)Buryat Republic bo͝oryätˈēə [key], constituent republic (2020 est. pop. 985,431), c.135,600 sq mi ...

water mold

(Encyclopedia)water mold, common name for a group of multinucleated organisms that superficially resemble fungi but are now recognized as having an independent evolutionary lineage and are placed in the kingdom Pro...

bichir

(Encyclopedia)bichir bĭchˈər [key], common name for African freshwater fishes as of the family Polypteridae, and particularly for those of the genus Polypterus. Bichirs are among the most primitive of the ray-fi...

Frederick III, Holy Roman emperor and German king

(Encyclopedia)Frederick III, 1415–93, Holy Roman emperor (1452–93) and German king (1440–93). With his brother Albert VI he inherited the duchies of Styria, Carinthia, and Carniola. He became head of the hous...

Arnold, Thomas

(Encyclopedia)Arnold, Thomas, 1795–1842, English educator, b. Isle of Wight, educated at Winchester school and at Corpus Christi College, Oxford. He was a fellow of Oriel College, Oxford, from 1815 to 1819, was o...

mendelevium

(Encyclopedia)mendelevium mĕndəlāvˈēəm [key], artificially produced radioactive chemical element; symbol Md; at. no. 101; mass no. of most stable isotope 258; m.p. 827℃; b.p. and sp. gr. unknown; valence +1...

Merwin, W. S.

(Encyclopedia)Merwin, W. S. (William Stanley Merwin), 1927–2019, American poet and translator, b. New York City. After graduating from Princeton in 1948, he traveled in Europe, working as a tutor and studying Rom...