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Aleutian Islands

(Encyclopedia)Aleutian Islands əlo͞oˈshən [key], chain of rugged, volcanic islands curving c.1,200 mi (1,900 km) west from the tip of the Alaska Peninsula and approaching Russia's Komandorski Islands. A partial...

Ryukyu Islands

(Encyclopedia)Ryukyu Islands rēo͞oˈkyo͞o [key], Jap. Ryukyu-retto or Nansei-shoto [southwest group], archipelago (1990 est. pop. 1,500,000), c.1,850 sq mi (4,790 sq km), SW Japan, in the W Pacific Ocean. The ch...

Caribbean Sea

(Encyclopedia)Caribbean Sea kârˌĭbēˈən, kərĭbˈēən [key], tropical sea, c.970,000 sq mi (2,512,950 sq km), arm of the Atlantic Ocean, Central America. It is bordered on the N and E by the West Indies arch...

Waziristan

(Encyclopedia)Waziristan wəzēˈrĭstänˌ [key], region (1981 est. pop. 545,000), 4,473 sq mi (11,585 sq km), Khyber Pakhtunkhwa (formerly North-West Frontier Province), Pakistan, on the Afghanistan border. An ex...

asparagine

(Encyclopedia)CE5 asparagine əspârˈəjēn [key], organic compound, one of the 20 amino acids commonly found in animal proteins. Only the l-stereoisomer participates in the biosynthesis of mammalian proteins. ...

yttrium

(Encyclopedia)yttrium ĭtˈrēəm [key] [for Ytterby, a town in Sweden], metallic chemical element; symbol Y; at. no. 39; at. wt. 88.90585; m.p. about 1,522℃; b.p. 3,338℃; sp. gr. about 4.45; valence +3. Yttriu...

shuffleboard

(Encyclopedia)shuffleboard, sport in which players use cue sticks to push disks onto a scoring diagram at either end of a concrete or terrazzo court. The court is 52 ft (15.85 m) long and 6 ft (1.83 m) wide. The ba...

herbicide

(Encyclopedia)herbicide hrˈbəsīdˌ [key], chemical compound that kills plants or inhibits their normal growth. A herbicide in a particular formulation and application can be described as selective or nonselectiv...

photosynthesis

(Encyclopedia)photosynthesis fōˌtōsĭnˈthəsĭs [key], process in which green plants, algae, and cyanobacteria utilize the energy of sunlight to manufacture carbohydrates from carbon dioxide and water in the pr...

limestone

(Encyclopedia)limestone, sedimentary rock wholly or in large part composed of calcium carbonate. It is ordinarily white but may be colored by impurities, iron oxide making it brown, yellow, or red and carbon making...