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Pawtucket

(Encyclopedia)Pawtucket pətəkˈət [key], city (1990 pop. 72,644), Providence co., NE R.I., on the Blackstone River at Pawtucket Falls; settled 1671, inc. 1885 after the eastern section (which was part of Massach...

Évreux

(Encyclopedia)Évreux āvröˈ [key], town , capital of Eure dept., N France, in Normandy. It is an industr...

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...

hydrogen peroxide

(Encyclopedia)hydrogen peroxide, chemical compound, H2O2, a colorless, syrupy liquid that is a strong oxidizing agent and, in water solution, a weak acid. It is miscible with cold water and is soluble in alcohol an...

Incheon

(Encyclopedia)Incheon or Inchon ĭnˈchän, Korean ēnchən [key], city, Gyeonggi (Kyonggi) prov., NW South Korea, on the Yellow Se...

inlaying

(Encyclopedia)inlaying, process of ornamenting a surface by setting into it material of different color or substance, usually in such a manner as to preserve a continuous plane. Inlay is employed in connection with...

endangered species

(Encyclopedia)endangered species, any plant or animal species whose ability to survive and reproduce has been jeopardized by human activities. In 1999 the U.S. government, in accordance with the U.S. Endangered Spe...

Mayotte

(Encyclopedia)Mayotte mīŏtˈ [key], island (2015 est. pop. 240,000), 144 sq mi (374 sq km), French departmental collectivity, Indian Ocean, in the Comoro chain. Mamoudzou is the capital and largest city. The land...

acetylene

(Encyclopedia)acetylene ĕthˈīn [key], HC≡CH, a colorless gas. It melts at −80.8℃ and boils at −84.0℃. Offensive odors often noted in commercial acetylene are due to impurities. Acetylene forms explosiv...

refining

(Encyclopedia)refining, any of various processes for separating impurities from crude or semifinished materials. It includes the finer processes of metallurgy, the fractional distillation of petroleum into its comm...