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Chaetognatha

(Encyclopedia)CE5 Anatomy of an arrow worm, Sagitta, representative of the phylum Chaetognatha Chaetognatha kētôgnăthˈə [key], phylum of predominantly pelagic marine animals commonly known as arrowworms. A...

Dewey, Melvil

(Encyclopedia)Dewey, Melvil, 1851–1931, American library pioneer, originator of the Dewey decimal system, b. Adams Center, N.Y., grad. Amherst (B.A., 1874; M.A., 1877). A man of originality and of enormous energy...

Axel, Richard

(Encyclopedia)Axel, Richard ăkˈsĕl [key], 1946–, American pathologist and biochemist, b. New York City, M.D. Johns Hopkins, 1970. A professor at Columbia from 1978, Axel was awarded, with Linda B. Buck, the 20...

Zagros

(Encyclopedia)Zagros zăgˈrŏs [key], mountain system of W Iran, extending c.1,100 mi (1,770 km) from the Turkish-Armenian frontier SE to the Strait of Hormuz, forming the western and southern border of the centra...

Volga-Baltic Waterway

(Encyclopedia)Volga-Baltic Waterway, canal and river system, c.685 mi (1,100 km) long, N European Russia. It links the Volga River and the St. Petersburg industrial area. It consists of the Moscow-Volga Canal, the ...

Brace, Charles Loring

(Encyclopedia)Brace, Charles Loring, 1826–90, American clergyman and social reformer, b. Litchfield, Conn. America's pioneer children's advocate, he founded (1853) the Children's Aid Society of New York, an organ...

digital radio

(Encyclopedia)digital radio, audio broadcasting in which an analog audio signal is converted into a digital signal before being transmitted; also known as digital audio broadcasting (DAB) and high-definition radio....

federal government

(Encyclopedia)federal government or federation, government of a union of states in which sovereignty is divided between a central authority and component state authorities. A federation differs from a confederation...

Alpha Centauri

(Encyclopedia)Alpha Centauri ălˈfə sĕntôrˈē [key], brightest star in the constellation Centaurus and 3d-brightest star in the sky; also known as Rigil Kent or Rigil Kentaurus; 1992 position R.A. 14h39.1m, De...

satellite, artificial

(Encyclopedia)CE5 A. Nimbus weather satellite B. Syncom communications satellite satellite, artificial, object constructed by humans and placed in orbit around the earth or other celestial body (see also space ...