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Brown v. Board of Education of Topeka, Kans.

(Encyclopedia)Brown v. Board of Education of Topeka, Kans., case decided by the U.S. Supreme Court in 1954. Linda Brown was denied admission to her local elementary school in Topeka because she was black. When, com...

Webster, Noah

(Encyclopedia)Webster, Noah, 1758–1843, American lexicographer and philologist, b. West Hartford, Conn., grad. Yale, 1778. After serving in the American Revolution, Webster practiced law in Hartford. His Grammati...

flame

(Encyclopedia)flame, phenomenon associated with the chemical reaction of a gas that has been heated above its kindling temperature with some other gas, usually atmospheric oxygen (see combustion). The heat and ligh...

radon

(Encyclopedia)radon rāˈdŏn [key], gaseous radioactive chemical element; symbol Rn; at. no. 86; mass no. of most stable isotope 222; m.p. about −71℃; b.p. −61.8℃; density 9.73 grams per liter at STP; vale...

aurora borealis

(Encyclopedia)aurora borealis ôstrāˈlĭs [key], luminous display of various forms and colors seen in the night sky. The aurora borealis of the Northern Hemisphere is often called the northern lights, and the aur...

home schooling

(Encyclopedia)home schooling, the practice of teaching children in the home as an alternative to attending public or private elementary or high school. In most cases, one or both of the children's parents serve as ...

Schubert, Franz Peter

(Encyclopedia)Schubert, Franz Peter fränts pāˈtər sho͞oˈbərt [key], 1797–1828, Austrian composer, one of the most gifted musicians of the 19th cent. His symphonic works represent the best legacy of the cla...

wave, in physics

(Encyclopedia)wave, in physics, the transfer of energy by the regular vibration, or oscillatory motion, either of some material medium or by the variation in magnitude of the field vectors of an electromagnetic fie...

Lévi-Strauss, Claude

(Encyclopedia)Lévi-Strauss, Claude klōd lāˈvē-strous [key], 1908–2009, French anthropologist, b. Brussels, Belgium, Ph.D Univ. of Paris, 1948. He carried out research in Brazil from 1935 to 1939. From 1942 t...

Hindustani

(Encyclopedia)Hindustani hĭndo͞ostänˈē [key], subdivision of the Indic group of the Indo-Iranian languages, which ...