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Rockefeller Center

(Encyclopedia)Rockefeller Center, complex of buildings in central Manhattan, New York City, between 48th and 51st streets and Fifth Ave. and the Ave. of the Americas (Sixth Ave.). The project was sponsored by John ...

borer

(Encyclopedia)borer, name applied to various animals that are injurious because of their ability to penetrate plant or animal tissues. Among insects, some borers are beetles, e.g., the flatheaded apple-tree borer, ...

waterfall

(Encyclopedia)waterfall, a sudden unsupported drop in a stream. It is formed when the stream course is interrupted as when a stream passes over a layer of harder rock—often igneous—to an area of softer and ther...

East Moline

(Encyclopedia)East Moline mōlēnˈ [key], city (2020 pop. 20,393), Rock Island co., NW Ill., a suburb of M...

Ellora

(Encyclopedia)Ellora ĕlōˈrə [key], village, E central Maharashtra state, India. Extending more than 1 mi (1.6 km) on a hill are 34 rock and cave temples (5th–13th cent.), most of them Hindu but some Buddhist ...

Rephidim

(Encyclopedia)Rephidim rĕfˈĭdĭm, rēfĭdˈĭm [key], in the Bible, unlocated place in Sinai where Moses struck the rock and brought forth water. ...

petroglyphs

(Encyclopedia)petroglyphs: see rock carvings and paintings. ...

Arkansas, University of

(Encyclopedia)Arkansas, University of, mainly at Fayetteville; land-grant and state supported; coeducational; chartered 1871, opened 1872; called Arkansas Industrial Univ. until 1899. The Univ. of Arkansas for Medi...

pumice

(Encyclopedia)pumice pŭmˈĭs [key], volcanic glass formed by the solidification of lava that is permeated with gas bubbles. Usually found at the surface of a lava flow, it is colorless or light gray and has the g...

Pei, I. M.

(Encyclopedia)Pei, I. M. (Ieoh Ming Pei) pā [key], 1917–2019, Chinese-American architect, b. Guangzhou, China. Pei immigrated to the United States in 1935 and studied at the Univ. of Pennsylvania, the Massachuse...