Columbia Encyclopedia
Search results
500 results found
beta particle
(Encyclopedia)beta particle, one of the three types of radiation resulting from natural radioactivity. Beta radiation (or beta rays) was identified and named by E. Rutherford, who found that it consists of high-spe...scarlet fever
(Encyclopedia)scarlet fever or scarlatina, an acute, communicable infection, caused by group A hemolytic streptococcal bacteria (see streptococcus) that produce an erythrogenic toxin. The disease is now uncommon, p...silicone
(Encyclopedia)silicone, polymer in which atoms of silicon and oxygen alternate in a chain; various organic radicals, such as the methyl group, CH3, are bound to the silicon atoms. Silicones, which are unusually sta...Sotomayor, Sonia
(Encyclopedia)Sotomayor, Sonia sōtōmīyôrˈ [key], 1954–, associate justice of the U.S. Supreme Court (2009–), b. Bronx, N.Y., to Puerto Rican parents, grad. Princeton (B.A. 1976), Yale (J.D. 1979). She work...Spratly Islands
(Encyclopedia)Spratly Islands, group of about 100 low islands and coral reefs in the central South China Sea, intersecting busy shipping lanes. The whole group is claimed by China, Taiwan, and Vietnam, and parts ar...narcolepsy
(Encyclopedia)narcolepsy, a sleep disorder characterized by excessive daytime sleepiness and recurring unwanted episodes of sleep (“sleep attacks”). People with narcolepsy may abruptly fall asleep at almost any...narthex
(Encyclopedia)narthex närˈthĕks [key], entrance feature peculiar to early Christian and Byzantine churches, although also found in some Romanesque churches, especially in France and Italy. Usually extending acro...New York Times Company v. Sullivan
(Encyclopedia)New York Times Company v. Sullivan, case decided in 1964 by the U.S. Supreme Court. In 1960, the Times ran a fundraising advertisement signed by civil-rights leaders that criticized, among other thing...anointing of the sick
(Encyclopedia)anointing of the sick, sacrament of the Orthodox Eastern Church and the Roman Catholic Church, formerly known as extreme unction. In it a sick or dying person is anointed on eyes, ears, nostrils, lips...echo, in acoustics
(Encyclopedia)echo, reflection of a sound wave back to its source in sufficient strength and with a sufficient time lag to be separately distinguished. If a sound wave returns within 1⁄10 sec, the human ear is in...Browse by Subject
- Earth and the Environment +-
- History +-
- Literature and the Arts +-
- Medicine +-
- People +-
- Philosophy and Religion +-
-
Places
+-
- Africa
- Asia
- Australia and Oceania
- Britain, Ireland, France, and the Low Countries
- Commonwealth of Independent States and the Baltic Nations
- Germany, Scandinavia, and Central Europe
- Latin America and the Caribbean
- Oceans, Continents, and Polar Regions
- Spain, Portugal, Italy, Greece, and the Balkans
- United States, Canada, and Greenland
- Plants and Animals +-
- Science and Technology +-
- Social Sciences and the Law +-
- Sports and Everyday Life +-
