Search

Search results

Displaying 121 - 130

Archimedes

(Encyclopedia) ArchimedesArchimedesärkĭmēˈdēz [key], 287–212 b.c., Greek mathematician, physicist, and inventor. He is famous for his work in geometry (on the circle, sphere, cylinder, and parabola…

Arctic Council

(Encyclopedia) Arctic Council, intergovernmental forum established to promote cooperation, coordination, and interaction among the arctic nations, with the involvement of indigenous peoples and…

equator

(Encyclopedia) equator, imaginary great circle around the earth, everywhere equidistant from the two geographical poles and forming the base line from which latitude is reckoned. The equator, which…

Hypsicles of Alexandria

(Encyclopedia) Hypsicles of AlexandriaHypsicles of Alexandriahĭpˈsĭklēz [key], astronomer of ancient Greece. Some authorities place Hypsicles in the 2d cent. b.c. and some in the 2d cent. a.d. The…

Corona, city, United States

(Encyclopedia) Corona Corona kərōˈnə [key], city (2020 pop. 157,136), Riverside co., S Calif.; inc. 1896. The…

Neurath, Otto

(Encyclopedia) Neurath, Otto, 1882–1945, Austrian philosopher, social scientist, and design theorist, b. Vienna. During the 1920s and 30s he was both a Marxist and a member of the Vienna Circle, an…

altitude

(Encyclopedia) altitude, vertical distance of an object above some datum plane, such as mean sea level or a reference point on the earth's surface. It is usually measured by the reduction in…

transit instrument

(Encyclopedia) transit instrument or transit, telescope devised to observe stars as they cross the meridian and used for determining time. Its viewing tube swings on a rigid horizontal axis…

megalithic monument

(Encyclopedia) megalithic monumentmegalithic monumentmĕgəlĭthˈĭk [key] [Gr.,=large stone], in archaeology, a construction involving one or several roughly hewn stone slabs of great size; it is…