Columbia Encyclopedia

Search results

500 results found

mast

(Encyclopedia)mast, large metal or timber pole secured vertically or nearly vertically in a ship, used primarily for supporting sails and rigging. The mast is as old as sailing vessels, and the oldest sailboats dep...

Mastigophora

(Encyclopedia)Mastigophora măsˌtĭgŏfˈərə [key], phylum of unicellular heterotrophic protozoans of the kingdom Protista. Most of the approximately 1,500 species of Mastigophora are propelled by one or more fl...

rib

(Encyclopedia)rib, one of the slender, elongated, curved bones that compose the chest cage in higher vertebrates. Ribs occur in pairs, and are found in most vertebrates; however, in some lower vertebrates, includin...

D'Alema, Massimo

(Encyclopedia)D'Alema, Massimo mäsˈsēmōˌ dälāˈmä [key], 1949–, Italian politician, premier (1998–2000) of Italy. A member of the Italian Communist party (PCI) since 1968, he worked as a journalist and ...

valine

(Encyclopedia)CE5 valine vălˈēn [key], organic compound, one of the 22 α-amino acids commonly found in animal proteins. Only the l-stereoisomer appears in mammalian protein. It is one of several essential am...

Bellamy, Edward

(Encyclopedia)Bellamy, Edward bĕlˈəmē [key], 1850–98, American author, b. Chicopee Falls (now part of Chicopee), Mass. After being admitted to the bar he tried his hand at journalism and contributed short sto...

potassium chloride

(Encyclopedia)potassium chloride, chemical compound, KCl, a colorless or white, cubic, crystalline compound that closely resembles common salt (sodium chloride). It is soluble in water, alcohol, and alkalies. Potas...

Prokhorov, Aleksandr Mikhailovich

(Encyclopedia)Prokhorov, Aleksandr Mikhailovich əlyĭksänˈdər mēkhīˈləvĭch prôˈkhərəf [key], 1916–2002, Russian physicist, b. Atherton, Queensland, Australia. In 1923 he was taken to the Soviet Union...

parole

(Encyclopedia)parole pərōlˈ [key], in criminal law, release from prison of a convict before the expiration of his term on condition that his activities be restricted and that he report regularly to an officer. T...

gall bladder

(Encyclopedia)CE5 Gall bladder gall bladder, small pear-shaped sac that stores and concentrates bile. It is connected to the liver (which produces the bile) by the hepatic duct. When food containing fat reaches...