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opal

(Encyclopedia)opal ōˈpəl [key], a mineral consisting of poorly crystalline to amorphous silica, SiO2·nH2O; the water content is quite variable but usually ranges from 3% to 10%. Common opal is usually colorless...

laminitis

(Encyclopedia)laminitis lămˌənīˈtĭs [key], also called founder, inflammation of the lamina, the innermost layer of the hoof wall in horses, ponies, and donkeys. Although the condition usually affects only the...

sweepstakes

(Encyclopedia)sweepstakes, contest or race, usually a horse race, on which a lottery is run. Prizes are awarded to the holders of winning tickets. In the case of a horse race, the draw is made from the names of all...

Schongauer, Martin

(Encyclopedia)Schongauer, Martin märˈtēn shōnˈgou-ər [key], 1430–91, German engraver and painter, son of a goldsmith of Colmar, Alsace. Schongauer's only certain painting is Madonna of the Rose Arbor (1473;...

Shawnee Prophet

(Encyclopedia)Shawnee Prophet, 1775?–1837?, Native North American of the Shawnee tribe; brother of Tecumseh. His Native American name was Tenskwautawa. He announced himself as a prophet bearing a revelation from ...

Brachiopoda

(Encyclopedia)CE5 Internal anatomy of a lamp shell, Magellania, representative of the phylum Brachiopoda Brachiopoda brākēŏpˈədə [key], phylum of shelled sessile or sedentary marine animals, commonly know...

fur

(Encyclopedia)fur, hairy covering of an animal, especially the skins of animals that have thick, soft, close-growing hair next to the skin itself and coarser protective hair above it. The underhair is frequently ca...

ebony

(Encyclopedia)ebony, common name for members of the Ebenaceae, a family of trees and shrubs widely distributed in warmer climates and in the tropics. The principal genus, Diospyros, includes both ebony and persimmo...

ostracism

(Encyclopedia)ostracism ŏsˈtrəsĭzˌəm [key], ancient Athenian method of banishing a public figure. It was introduced after the fall of the family of Pisistratus. Each year the assembly took a preliminary vote ...

Laban, Rudolf von

(Encyclopedia)Laban, Rudolf von fôn läbˈän [key], 1879–1958, Slovakian dancer, choreographer, and dance theorist. After studying in Paris and performing in N Africa, Germany, and Austria, he founded (1910) a ...