Columbia Encyclopedia

(Encyclopedia) wrestling, sport in which two unarmed opponents grapple with one another. The object is to secure a fall, i.e., cause the opponent to lose balance and fall to the floor, and ultimately to pin the supi...

(Encyclopedia) Pliocene epoch plīˈəsēn [key], fifth epoch of the Cenozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table), from 5.1 to 2 million years ago. By the beginning of the P...

(Encyclopedia) Mahfouz, Naguib nəgēbˈ mäkhfo͞osˈ [key], 1911–2006, Egyptian novelist and short-story writer, b. Cairo. After his graduation (1934) from Cairo Univ., he worked in various government ministries...

(Encyclopedia) Oligocene epoch ŏlˈəgōsēnˌ [key], third epoch of the Tertiary period in the Cenozoic era of geologic time, lasting from 38 to 24 million years ago. More of North America was dry land during the ...

(Encyclopedia) olive, common name for the Oleaceae, a family of trees and shrubs (including climbing forms) of warm temperate climates and of the Old World tropics, especially Asia and the East Indies. Many are popu...

(Encyclopedia) smoke, visible gaseous product of incomplete combustion. Smoke varies with its source, but it usually comprises hot gas and suspended particles of carbon and tarry substances, or soot. To reduce the a...

(Encyclopedia) Liaoning lyouˈnĭngˈ [key], province (2010 pop. 43,746,323), c.58,400 sq mi (151,295 sq km), NE China, on the Bohai and Korea Bay. The capital is Shenyang (Mukden). A part of Manchuria, it encompass...

(Encyclopedia) charcoal, substance obtained by partial burning or carbonization (destructive distillation) of organic material. It is largely pure carbon. The entry of air during the carbonization process is control...

(Encyclopedia) iodine īˈədīn, –dĭn [key] [Gr.,=violet], nonmetallic chemical element; symbol I; at. no. 53; at. wt. 126.90447; m.p. 113.5℃; b.p. 184.35℃; sp. gr. 4.93 at 20℃; valence −1, +1, +3, +5, o...

(Encyclopedia) Aden äˈdən, āˈdən [key], city, SW Yemen, on the Gulf of Aden near the southern entrance to the Red Sea. It is the chief port of Yemen. Aden consists of two peninsula...