Columbia Encyclopedia

Search results

460 results found

Aco, Michel

(Encyclopedia)Aco or Accault, Michel both: mēshĕlˈ äkōˈ [key], fl. 1680–1702, French explorer. He became La Salle's lieutenant, being favored by that explorer because of his courage, prudence, and wide acqu...

tetany

(Encyclopedia)tetany tĕtˈənē [key], condition of mineral imbalance in the body that results in severe muscle spasms. Tetany occurs when the concentration of calcium ions (Ca++) in extracellular fluids such as p...

James Bay Project

(Encyclopedia)James Bay Project, a colossal hydroelectric development of the rivers emptying into the E James Bay, central Quebec, Canada. La Grande Phase I, finished in 1985, created the world's largest undergroun...

moraine

(Encyclopedia)moraine mərānˈ [key], a formation composed of unsorted and unbedded rock and soil debris called till, which was deposited by a glacier. The till that falls on the sides of a valley glacier from the...

Davis, Viola

(Encyclopedia) Davis, Viola, 1965-, African-American actress and producer, b. St. Matthews, S.C., Rhode Island College (B.A., 1988), Juilliard (1993, acting; honorary...

Amos

(Encyclopedia)Amos āˈməs [key], prophetic book of the Bible. The majority of its oracles are chronologically earlier than those of the Bible's other prophetic books. His activity is dated c.760 b.c. The prophet ...

Gilbert, Grove Karl

(Encyclopedia)Gilbert, Grove Karl, 1843–1918, American geologist, b. Rochester, N.Y., grad. Univ. of Rochester, 1862. When the U.S. Geological Survey was created in the Dept. of the Interior in 1879 (to replace f...

fog

(Encyclopedia)fog, aggregation of water droplets or ice crystals immediately above the surface of the earth (i.e., a cloud near the ground). A light or thin fog is usually called a mist. Fog may occur when the mois...

water wheel, device

(Encyclopedia)water wheel, device for utilizing the power of flowing or falling water. The Norse wheel is the oldest type known. Despite its name it probably originated in the Middle East, where the swift stream re...

Roebling, John Augustus

(Encyclopedia)Roebling, John Augustus rōˈblĭng [key], 1806–69, German-American engineer, b. Mulhouse. He studied engineering in Berlin and in 1831 came to the United States. He demonstrated the practicability ...
 

Browse by Subject