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probability
(Encyclopedia)probability, in mathematics, assignment of a number as a measure of the “chance” that a given event will occur. There are certain important restrictions on such a probability measure. In any exper...Turner, Joseph Mallord William
(Encyclopedia)Turner, Joseph Mallord William, 1775–1851, English landscape painter, b. London. Turner was the foremost English romantic painter and the most original of English landscape artists; in watercolor he...Mencken, H. L.
(Encyclopedia)Mencken, H. L. (Henry Louis Mencken) mĕngˈkən, mĕnˈ– [key], 1880–1956, American editor, author, and critic, b. Baltimore, studied at the Baltimore Polytechnic. Probably America's most influen...cult
(Encyclopedia)cult, ritual observances involved in worship of, or communication with, the supernatural or its symbolic representations. A cult includes the totality of ideas, activities, and practices associated wi...ultraviolet radiation
(Encyclopedia)ultraviolet radiation, invisible electromagnetic radiation between visible violet light and X rays; it ranges in wavelength from about 400 to 4 nanometers and in frequency from about 1015 to 1017 hert...relativity
(Encyclopedia)relativity, physical theory, introduced by Albert Einstein, that discards the concept of absolute motion and instead treats only relative motion between two systems or frames of reference. One consequ...Roger II
(Encyclopedia)Roger II, c.1095–1154, count (1101–30) and first king (1130–54) of Sicily, son and successor of Roger I. He conquered (1127) Apulia and Salerno and sided with the antipope Anacletus II against P...Scorpius
(Encyclopedia)Scorpius –pēō [key] [Lat.,=the scorpion], conspicuous southern constellation lying on the ecliptic (the sun's apparent path through the heavens) between Sagittarius and Libra; it is one of the con...sandstorm
(Encyclopedia)sandstorm, strong dry wind blowing over the desert that raises and carries along clouds of sand or dust often so dense as to obscure the sun and reduce visibility almost to zero; also known as a dusts...pika
(Encyclopedia)pika pīˈkə [key], short-haired mammal related to rabbits and hares, also called mouse hare and rock rabbit. Pikas live above the timber line in the mountains of N Asia and W North America. The pika...Browse by Subject
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