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lava

(Encyclopedia)lava läˈvə [key], molten rock that erupts on the earth's surface, either on land or under the ocean, by a volcano or through a fissure. It solidifies into igneous rock that is also called lava. Bef...

Thames , river, England

(Encyclopedia)Thames tĕmz [key], Rom. Tamesis, principal river of England, c.210 mi (340 km) long. It rises in four headstreams (the Thames or Isis, Churn, Coln, and Leach) in the Cotswold Hills, E Gloucestershire...

sea lion

(Encyclopedia)sea lion, fin-footed marine mammal of the eared seal family (Otariidae). Like the other member of this family, the fur seal, the sea lion is distinguished from the true seal by its external ears, long...

Euphrates

(Encyclopedia)Euphrates yo͞ofrāˈtēz [key], Turkish Frat, Arabic Al Furat, river of SW Asia, c.1,700 mi (2,740 km) long, formed by the confluence of the Kara and the Murad rivers, E central Turkey, and flowing g...

Faeroe Islands

(Encyclopedia)Faeroe Islands or Faröe Islands both: fârˈō [key], Dan. Færøerne, Faeroese Føroyar, group of volcanic islands (2015 est. pop. 49,000), 540 sq mi (1,399 sq km), Denmark, in the N Atlantic, betwe...

Farragut, David Glasgow

(Encyclopedia)Farragut, David Glasgow fărˈəgət [key], 1801–70, American admiral, b. near Knoxville, Tenn. Appointed a midshipman in 1810, he first served on the frigate Essex, commanded by David Porter, his s...

jellyfish

(Encyclopedia)jellyfish, common name for the free-swimming stage (see polyp and medusa), of certain invertebrate animals of the phylum Cnidaria (the coelenterates). The body of a jellyfish is shaped like a bell or ...

Michigan, Lake

(Encyclopedia)Michigan, Lake, 22,178 sq mi (57,441 sq km), 307 mi (494 km) long and 30 to 120 mi (48–193 km) wide, bordered by Mich., Ind., Ill., and Wis.; third largest of the Great Lakes and the only one entire...

mercury poisoning

(Encyclopedia)mercury poisoning, tissue damage resulting from exposure to more than trace amounts of the element mercury or its compounds. Elemental mercury (the silver liquid familiar from thermometers) is the mos...

Tuvalu

(Encyclopedia)Tuvalu to͞ovälˈo͞o [key], independent Commonwealth nation (2015 est. pop. 11,000), 10 sq mi (26 sq km), composed of nine low coral atolls, formerly known as the Ellice (or Lagoon) Islands, scatter...