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age grade and age set

(Encyclopedia)age grade and age set, differentiation of social role based on age, commonly found in small-scale societies of North America and East Africa. Age sets are a type of sodality (nonresidential groups tha...

Bridgman, Laura

(Encyclopedia)Bridgman, Laura, 1829–89, the first blind and deaf person to be successfully educated, b. Hanover, N.H. Under the guidance of Dr. S. G. Howe, of the Perkins School for the Blind, she learned to read...

Trudeau, Justin Pierre James

(Encyclopedia)Trudeau, Justin Pierre James tro͞odōˈ [key], 1971–, Canadian politician, b. Ottawa; grad. McGill Univ. (B.A., 1994), Univ. of British Columbia (B.Ed., 1998), son of Pierre Trudeau. He briefly tau...

Soloviev, Vladimir Sergeyevich

(Encyclopedia)Soloviev, Vladimir Sergeyevich vlədyēˈmĭr sĭrgāˈəvĭch sələvyôfˈ [key], 1853–1900, Russian religious philosopher and poet; son of Sergei Mikhailovich Soloviev. Soloviev believed in the i...

Bard, John

(Encyclopedia)Bard, John, 1716–99, American physician, persuaded New York to establish on Bedloe Island its first quarantine station and was himself the first health officer. He wrote on yellow fever, malignant p...

cataract

(Encyclopedia)cataract, in medicine, opacity of the lens of the eye, which impairs vision. In the young, cataracts are generally congenital or hereditary; later they are usually the result of degenerative changes b...

cardinal, in zoology

(Encyclopedia)cardinal or redbird, common name for a North American songbird of the family Fringillidae (New World finch family). In the eastern cardinal, Richmondena cardinalis, the male is bright scarlet with bla...

Carmichael, Hoagy

(Encyclopedia)Carmichael, Hoagy hōˈgē [key] (Hoagland Howard Carmichael), 1899–1981, American songwriter, pianist, and singer, b. Bloomington, Ind. While still a student at Indiana Univ. he was influenced by a...

Orion Nebula

(Encyclopedia)Orion Nebula, bright diffuse nebula in the constellation Orion; also known as the Great Nebula of Orion and cataloged as M42 or NGC 1976. It is located near the middle of the “sword” hanging from ...

earthworm

(Encyclopedia)earthworm, terrestrial, cylindrical segmented worm of the class Oligochaeta. There are 2,200 earthworm species, found all over the world except in arid and arctic regions and ranging in size from 1 in...