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gorilla

(Encyclopedia)gorilla, an ape, genus Gorilla, native to the lowland and mountain forests of western and central equatorial Africa. The two gorilla species are the western, comprising the western lowland (G. gorilla...

Staël, Germaine de

(Encyclopedia)Staël, Germaine de zhĕrmĕnˈ də stäl [key], 1766–1817, French-Swiss woman of letters, whose full name was Anne Louise Germaine Necker, baronne de Staël-Holstein. Born in Paris, the daughter of...

arsenic

(Encyclopedia)arsenic ärˈsənĭk [key], a semimetallic chemical element; symbol As; at. no. 33; at. wt. 74.92160; m.p. 817℃ (at 28 atmospheres pressure); sublimation point 613℃; sp. gr. (stable form) 5.73; va...

Monet, Claude

(Encyclopedia)Monet, Claude klōd mônāˈ [key], 1840–1926, French landscape painter, b. Paris. Monet was a founder of impressionism. He adhered to its principles throughout his long career and is considered the...

Ruskin, John

(Encyclopedia)Ruskin, John, 1819–1900, English critic and social theorist. During the mid-19th cent. Ruskin was the virtual dictator of artistic opinion in England, but Ruskin's reputation declined after his deat...

sea turtle

(Encyclopedia)sea turtle, name for several species of large marine turtles found in tropical and subtropical oceans. These turtles are modified for life in the ocean by having flipperlike forelimbs without toes and...

semiconductor

(Encyclopedia)CE5 N-type and P-type crystals: In a pure silicon crystal each silicon atom (Si) is surrounded by four valence electrons. In the N-doped semiconductor, illustrated in the left-hand figure, some sil...

iodine

(Encyclopedia)iodine īˈədīn, –dĭn [key] [Gr.,=violet], nonmetallic chemical element; symbol I; at. no. 53; at. wt. 126.90447; m.p. 113.5℃; b.p. 184.35℃; sp. gr. 4.93 at 20℃; valence −1, +1, +3, +5, o...

Hartford Convention

(Encyclopedia)Hartford Convention, Dec. 15, 1814–Jan. 4, 1815, meeting to consider the problems of New England in the War of 1812; held at Hartford, Conn. Prior to the war, New England Federalists (see Federalist...

superconductivity

(Encyclopedia)superconductivity, abnormally high electrical conductivity of certain substances. The phenomenon was discovered in 1911 by Heike Kamerlingh Onnes, who found that the resistance of mercury dropped sudd...