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olivine

(Encyclopedia)olivine ŏlĭvˈēn [key], an iron-magnesium silicate mineral, (Mg,Fe)2SiO4, crystallizing in the orthorhombic system. It is a common constituent of magnesium-rich, silica-poor igneous rocks; metamorp...

Casa Grande

(Encyclopedia)Casa Grande käˈsä gränˈdā [key], city (2020 pop. 53,658), Pinal co., S Ariz.; inc. 1915. It lies in ...

Tohono O'Odham

(Encyclopedia)Tohono O'Odham păpˈəgōˌ, päˈ– [key], Native North Americans speaking a language that belongs to the Uto-Aztecan branch of the Aztec-Tanoan linguistic stock (see Native American languages) and...

Geronimo

(Encyclopedia)Geronimo jərŏnˈəmōˌ [key], c.1829–1909, leader of a Chiricahua group of the Apaches, b. Arizona. From his youth he participated in the forays of Cochise, Victorio, and other Apache leaders. Wh...

garnet

(Encyclopedia)garnet, name applied to a group of isomorphic minerals crystallizing in the cubic system. They are used chiefly as gems and as abrasives (as in garnet paper). The garnets are double silicates; one of ...

Sorenstam, Annika

(Encyclopedia)Sorenstam, Annika, 1970–, Swedish golfer. Acclaimed by many as golf's greatest female player, she dominated the game in the late 1990s and early 2000s. She played for the Swedish national team (1987...

Oratory, Congregation of the

(Encyclopedia)Oratory, Congregation of the [Lat. abbr., Cong. Orat.], in the Roman Catholic Church, founded in 1575, an association of secular priests organized into independent communities according to the rule wr...

Ostrom, Elinor Awan

(Encyclopedia)Ostrom, Elinor Awan, 1933–2012, American political economist, b. Los Angeles, Ph.D. Univ. of California, Los Angeles, 1965. She was on the faculty of the Univ. of Indiana, Bloomington, from 1965 unt...

Prescott, Edward Christian

(Encyclopedia)Prescott, Edward Christian, 1940–, American economist, b. Glen Falls, N.Y., Ph.D. Carnegie Mellon Univ., 1967. Prescott has taught at Carnegie Mellon (1971–80), the Univ. of Minnesota (1980–98, ...

La Farge, Oliver

(Encyclopedia)La Farge, Oliver lä färzh [key], 1901–63, American writer and anthropologist, b. New York City, grad. Harvard (B.A., 1924; M.A., 1929). He conducted three archaeological expeditions to Arizona and...