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pyramid, structure

(Encyclopedia)pyramid. The true pyramid exists only in Egypt and Sudan, though the term has also been applied to similar structures in other countries. Egyptian pyramids are square in plan and their triangular side...

pyramid, in geometry

(Encyclopedia)CE5 Pyramid pyramid, in geometry, solid figure bounded by a polygon (the base, or directrix) and the surface generated by a moving line (the generator) passing through a fixed point (vertex) and c...

food pyramid

(Encyclopedia)CE5 The U.S. Department of Agriculture used (1992–2005) this pyramid to show the basis of a healthy diet, dividing foods into five nutritional groups and recommending the number of daily average ...

Pyramid Lake

(Encyclopedia)Pyramid Lake, 188 sq mi (487 sq km), W Nev. The lake, a remnant of ancient Lake Lahontan, receives the Truckee River. Visited (1844) by U.S. explorer John Frémont, the lake was named for its large py...

nuclear structure

(Encyclopedia)nuclear structure: see nucleus. ...

stellar structure

(Encyclopedia)stellar structure, physical properties of a star and the processes taking place within it. Except for that of the sun, astronomers must draw their conclusions regarding stellar structure on the basis ...

bridge, structure

(Encyclopedia)CE5 Bridges bridge, structure built over water or any obstacle or depression to allow the passage of pedestrians or vehicles. See also viaduct. In wartime, where the means of crossing a stream o...

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...

Sakkara

(Encyclopedia)Sakkara or Saqqara säkäˈrä [key], necropolis (burial place) of ancient Memphis, Egypt, 3 mi (5 km) from the Nile and on the border of the Libyan desert. Djoser (Zoser) had his famous step-pyramid,...

Khufu

(Encyclopedia)Khufu kēˈŏps [key], fl. c.2680 b.c., king of ancient Egypt, founder of the IV dynasty. He was king for 23 years and was famous as the builder of the greatest pyramid at Giza. ...