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polymer

(Encyclopedia)CE5 A. Addition polymerization: Two ethylene molecules, C2H4, combine to form two links in the polyethylene chain molecule (C2H4)n. B. Condensation polymerization: Two glycine molecules, NH2CH2COOH...

Togoland

(Encyclopedia)Togoland tōˈgō [key], historic region (c.33,500 sq mi/86,800 sq km), W Africa, bordering on the Gulf of Guinea in the south. The western section of Togoland is now part of Ghana, and the eastern po...

Digne

(Encyclopedia)Digne -lā-băNˈ [key], city, capital of Alpes-de-Haute, Provence dept., SE France, in Prove...

Chalon-sur-Saône

(Encyclopedia)Chalon-sur-Saône shălôNˈ-sür-sōn [key], town, Saône-et-Loire dept., E central France, in Burgundy, ...

polystyrene

(Encyclopedia)polystyrene pŏlˌēstīˈrēn [key], widely used plastic; it is a polymer of styrene. Polystyrene is a colorless, transparent thermoplastic that softens slightly above 100℃ (212℉) and becomes a v...

printer

(Encyclopedia)printer, device that reproduces text, images, or other data from a computer, digital camera, smartphone, or the like on paper or another medium. Impact printers, which mostly have been superseded by i...

hundred

(Encyclopedia)hundred, in English history, a subdivision of a shire, first mentioned in the 10th cent. and surviving as a unit of local government into the 19th cent. It is thought that in origin the hundred compri...

pound

(Encyclopedia)pound, abbr. lb, unit of either mass or force in the customary system of English units of measurement. Two different pounds of mass are defined, one in the avoirdupois system of units and one in the T...

Allen, Ethan

(Encyclopedia)Allen, Ethan, 1738–89, hero of the American Revolution, leader of the Green Mountain Boys, and promoter of the independence and statehood of Vermont, b. Litchfield (?), Conn. He had some schooling a...

marines

(Encyclopedia)marines, troops that serve on board ships of war or in conjunction with naval operation. A British marine corps was established in 1664, and the need for skilled riflemen aboard military vessels broug...