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composition board

(Encyclopedia) composition board, wood product produced in the form of a board or sheet, formed of cellulose fibers or particles derived from wood or other sources, and used principally as a building…

calypso, in music

(Encyclopedia) calypso, a form of folk song developed on the island of Trinidad and also popular in other Caribbean countries. Thought to have begun with 19th-century black slaves, calypso songs…

chemical equation

(Encyclopedia) chemical equation, group of symbols representing a chemical reaction. There are a number of other symbols used in chemical equations. A symbol written above or below the reaction…

lycanthropy

(Encyclopedia) lycanthropylycanthropylīkănˈthrəpē [key], in folklore, assumption by a human of the appearance and characteristics of an animal. Ancient belief in lycanthropy was widespread, and it…

transducer

(Encyclopedia) transducer, device that accepts an input of energy in one form and produces an output of energy in some other form, with a known, fixed relationship between the input and output. One…

découpage

(Encyclopedia) découpagedécoupagedāˌk&oomacr;päzhˈ [key], any process of decorating surfaces in which paper cutouts made of new materials completely cover the surface. These cutouts are attached…

Hadad, in the Bible

(Encyclopedia) HadadHadadhāˈdăd [key], in the Bible. 1 Son of Ishmael. An alternate form is Hadar. 2 King of Edom. 3 Last king of Edom. Hadar is an alternate form. 4 Scion of the kings of Edom, who…

arsenic

(Encyclopedia) arsenicarsenicärˈsənĭk [key], a semimetallic chemical element; symbol As; at. no. 33; at. wt. 74.92160; m.p. 817℃ (at 28 atmospheres pressure); sublimation point 613℃; sp. gr. (stable…

cyclic compound

(Encyclopedia) cyclic compound, any one of a class of compounds whose molecules contain a number of atoms bonded together to form a closed chain or ring. If all of the atoms that form the ring are…

Solvay process

(Encyclopedia) Solvay process [for Ernest Solvay], commercial process for the manufacture of sodium carbonate (washing soda). Ammonia and carbon dioxide are passed into a saturated sodium chloride…