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cyclopropane
(Encyclopedia)cyclopropane, C3H6, a gaseous hydrocarbon. It is a cyclic alkane, its three carbon atoms being joined together in a ring. The angle between successive carbon-carbon bonds in the ring is only 60°, muc...circuit breaker
(Encyclopedia)circuit breaker, electric device that, like a fuse, interrupts an electric current in a circuit when the current becomes too high. The advantage of a circuit breaker is that it can be reset after it h...chernozem
(Encyclopedia)chernozem chĕrˈnəzĕmˌ [key] or black earth, variety of soil rich in organic matter in the form of humus. It is generally a modified type of loess. True chernozem is black in color, but there are ...COVID-19
(Encyclopedia)COVID-19, contagious viral disease caused by severe acute respiratory syndrome coronavirus 2, or SARS-CoV-2, a coronavirus that is genetically related to SARS-CoV, which causes SARS. Symptoms generall...Berlin, city, Germany
(Encyclopedia)Berlin bûrˌlĭnˈ, Ger. bĕrlēnˈ [key], city (2021 est. pop. 3,567,000), capital ...liana
(Encyclopedia)liana lēänˈ [key], name for any climbing plant that roots in the ground. The term is most often used for the woody vines that form a characteristic part of tropical rain-forest vegetation; they are...Andronicus I
(Encyclopedia)Andronicus I (Andronicus Comnenus) ăndrənīˈkəs kŏmnēˈnəs [key], 1120?–1185, Byzantine emperor (1183–85), nephew of John II. He acceded to the throne by strangling his cousin Alexius II. T...McCulloch, Hugh
(Encyclopedia)McCulloch, Hugh məkŭlˈək [key], 1808–95, American financier and public official, b. Kennebunk, Maine. Educated at Bowdoin College, he studied law in Boston and practiced two years at Fort Wayne,...Phuket
(Encyclopedia)Phuket po͞oˈkĭt [key], island, 206 sq mi (534 sq km), a province of Thailand, in the Andaman Sea, off the west coast of the Malay Peninsula. The town of Phuket is the capital. Flat, with isolated h...De Maizière, Lothar
(Encyclopedia)De Maizière, Lothar lōˈtär də mīˌzyĕˈzəs [key], 1940–, the first and last freely elected prime minister of the (East) German Democratic Republic. He joined the puppet Christian Democratic ...Browse by Subject
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