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star cluster

(Encyclopedia)star cluster, a group of stars near each other in space and resembling each other in certain characteristics that suggest a common origin for the group. Stars in the same cluster move at the same rate...

slang

(Encyclopedia)slang, vernacular vocabulary not generally acceptable in formal usage. It is notable for its liveliness, humor, emphasis, brevity, novelty, and exaggeration. Most slang is faddish and ephemeral, but s...

philanthropy

(Encyclopedia)philanthropy, the spirit of active goodwill toward others as demonstrated in efforts to promote their welfare. The term is often used interchangeably with charity. Every year vast sums of money are co...

Canary Islands

(Encyclopedia)Canary Islands, Span. Islas Canarias, group of seven islands (2020 est. pop. 2,161,000), 2,875 sq mi (7,445 sq km), autonomous community of Spain, ...

heat

(Encyclopedia)heat, nonmechanical energy in transit, associated with differences in temperature between a system and its surroundings or between parts of the same system. The study of heat and its relationship ...

hurricane

(Encyclopedia)CE5 View into the eye of a hurricane showing the structure of the surrounding cloud wall hurricane, tropical cyclone in which winds attain speeds greater than 74 mi (119 km) per hr. Wind speeds gu...

Continental System

(Encyclopedia)Continental System, scheme of action adopted by Napoleon I in his economic warfare with England from 1806 to 1812. Economic warfare had been carried on before 1806, but the system itself was initiated...

dairying

(Encyclopedia)dairying, business of producing, processing, and distributing milk and milk products. Ninety percent of the world's milk is obtained from cows; the remainder comes from goats, buffaloes, sheep, reinde...

Etruscan art

(Encyclopedia)Etruscan art ĭtrŭsˈkən [key], the art of the inhabitants of ancient Etruria, which, by the 8th cent. b.c., incorporated the area in Italy from Salerno to the Tiber River (see Etruscan civilization...

Opéra

(Encyclopedia)Opéra ôpāräˈ [key] (Académie de musique), former chief opera house of Paris, on the Place de l'Opéra, one of the main crossroads on the right bank of the Seine. Designed by J. L. C. Garnier and...