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Noatak National Preserve

(Encyclopedia) Noatak National Preserve, 6,569,904 acres (2,660,811 hectares), N Alaska. The preserve is the largest mountain-ringed river basin in the United States that is still virtually…

columbine, in botany

(Encyclopedia) columbinecolumbinekŏlˈəmbīn [key], any plant of the genus Aquilegia, temperate-zone perennials of the family Ranunculaceae (buttercup family), popular both as wildflowers and as garden…

alder

(Encyclopedia) alderalderôlˈdər [key], name for deciduous trees and shrubs of the genus Alnus of the family Betulaceae (birch family), widely distributed, especially in mountainous and moist areas of…

endoderm

(Encyclopedia) endodermendodermĕnˈdədûrmˌ [key], in biology, inner layer of tissue formed in the gastrula stage of the developing embryo. At the end of the blastula stage, cells of the embryo are…

Torrijos Herrera, Omar

(Encyclopedia) Torrijos Herrera, OmarTorrijos Herrera, Omarōmärˈ tōrēˈhōs ārāˈrä [key], 1929–81, military leader, dictator of Panama (1968–78). As a lieutenant colonel, he led, together with Col.…

Suez

(Encyclopedia) SuezSuezs&oomacr;ĕzˈ [key], city (1996 pop. 417,610), NE Egypt, at the northern end of the Gulf of Suez and at the southern terminus of the Suez Canal. An important port with…

taiga

(Encyclopedia) taigataigatīˈgə [key], northern coniferous-forest belt of Eurasia, bordered on the north by the treeless tundra and on the south by the steppe. This vast belt, comprising about one…

Arica

(Encyclopedia) Arica Arica ärēˈkä [key], city, N Chile, on the Pacific Ocean, just south of the Peruvian border and at the northern limit of the Atacama Desert. Peru ceded…

Gorgas, William Crawford

(Encyclopedia) Gorgas, William Crawford, 1854–1920, American disease and sanitation expert, surgeon general of the United States, b. Mobile, Ala., grad. Bellevue Hospital Medical College, 1879. He…

mesoderm

(Encyclopedia) mesoderm, in biology, middle layer of tissue formed in the gastrula stage of the developing embryo. At the end of the blastula stage, cells of the embryo are arranged in the form of a…