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trilobite

(Encyclopedia)CE5 Dorsal view of a trilobite trilobite trīˈləbītˌ [key], subphylum of the phylum Arthropoda that includes a large group of extinct marine animals that were abundant in the Paleozoic era. Th...

chief

(Encyclopedia)chief or chieftain, political leader of a band, tribe, or confederation of tribes. At the simpler levels of social organization, the band or tribe usually lacks centralized authority and is ruled by t...

Gamow, George

(Encyclopedia)Gamow, George gămˈŏf [key], 1904–68, Russian-American theoretical physicist and author, b. Odessa. A nuclear physicist, Gamow is better known to the public for his excellent books popularizing ab...

Smuts, Jan Christiaan

(Encyclopedia)Smuts, Jan Christiaan yän krĭsˈtyän smŭts [key], 1870–1950, South African statesman and soldier, b. Cape Colony. Of Boer (Afrikaner) stock but a British subject by birth, he was educated at Vic...

primate

(Encyclopedia)primate, member of the mammalian order Primates, which includes humans, apes, monkeys, and prosimians, or lower primates. The group can be traced to the late Cretaceous period, where members were fore...

cruise missile

(Encyclopedia)cruise missile, low-flying, continuously powered offensive missile designed to evade defense systems. A cruise missile typically uses an aircraft engine rather than a rocket engine to fly at subsonic ...

Chandrasekhar, Subrahmanyan

(Encyclopedia)Chandrasekhar, Subrahmanyan so͝obˌrəmänˈyən chŭnˌdrəsāˈkər [key], 1910–95, American astrophysicist, b. Lahore, India (now Pakistan). He became a professor at the Univ. of Chicago in 1938...

Fiske, John

(Encyclopedia)Fiske, John, 1842–1901, American philosopher and historian, b. Hartford, Conn. Born Edmund Fisk Green, he changed his name in 1855 to John Fisk, adding the final e in 1860. He opened a law practice ...

Baade, Walter

(Encyclopedia)Baade, Walter välˈtər bäˈdə [key], 1893–1960, German-born American astronomer. From 1919 to 1931 he was on the staff of the Hamburg observatory; from 1931 to 1958, at the Mt. Wilson observator...

Bjørnson, Bjørnstjerne

(Encyclopedia)Bjørnson, Bjørnstjerne byörnˈstyĕrnə byörnˈsōn [key], 1832–1910, Norwegian writer and political leader, one of the major figures of Norwegian literature. He was an influential journalist, w...