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Fujita scale

(Encyclopedia)Fujita scale fo͞ojēˈtə, fo͞oˈjētə [key] or F-Scale, scale for rating the severity of tornadoes as a measure of the damage they cause, devised in 1951 by the Japanese-American meteorologist Tet...

supercomputer

(Encyclopedia)supercomputer, a state-of-the-art, extremely powerful computer capable of manipulating massive amounts of data in a relatively short time. Supercomputers are very expensive and are employed for specia...

Bachelet, Michele

(Encyclopedia)Bachelet, Michele (Verónica Michele Bachelet Jeria) bĕōnˈēka mēchĕlˈ bächĕlĕtˈ herˈēä [key], 1951–, Chilean political leader and government official, president of Chile (2006–10, 20...

Wolfowitz, Paul Dundes

(Encyclopedia)Wolfowitz, Paul Dundes 1943–, American political figure, b. Brooklyn, N.Y., grad. Cornell (B.A. 1965), Univ. of Chicago (Ph.D. 1972). In 1966 he entered government service, and worked for the Arms C...

Northeast Passage

(Encyclopedia)Northeast Passage, water route along the northern coast of Europe and Asia, between the Atlantic and Pacific oceans. Beginning in the 15th cent., efforts were made to find a new all-water route to Ind...

seasons

(Encyclopedia)CE5 The seasons are caused by the tilt of the earth's axis to the plane of its orbit about the sun. The Northern Hemisphere is tilted toward the sun in the summer and receives more direct rays than...

cable television

(Encyclopedia)cable television, the transmission of televised images to viewers by means of coaxial cables. Cable systems receive the television signal, which is sent out over cables to individual subscribers, by a...

tent caterpillar

(Encyclopedia)tent caterpillar, common name for the larvae of the members of a family of moths (Lasiocampidae), easily recognized by the large silk tents, or webs, that the larvae construct during the spring in the...

Scott, Robert Falcon

(Encyclopedia)Scott, Robert Falcon, 1868–1912, British naval officer and antarctic explorer. He commanded two noted expeditions to Antarctica. The first expedition (1901–4), in the Discovery, organized jointly ...

alligator

(Encyclopedia)alligator, large aquatic reptile of the genus Alligator, in the same order as the crocodile. There are two species—a large type found in the S United States and a small type found in E China. Alliga...