Columbia Encyclopedia

Search results

500 results found

Wood, Robert Williams

(Encyclopedia)Wood, Robert Williams, 1868–1955, American physicist, b. Concord, Mass., grad. Harvard (B.A., 1891). After studying abroad he became associated with Johns Hopkins as professor of experimental physic...

Yalow, Rosalyn Sussman

(Encyclopedia)Yalow, Rosalyn Sussman, 1921–2011, American medical physicist, b. New York City, Ph.D. Univ. of Illinois, 1945. As a researcher at the Bronx Veterans Administration Hospital (from 1947), Yalow and c...

vomiting

(Encyclopedia)vomiting, ejection of food and other matter from the stomach through the mouth, often preceded by nausea. The process is initiated by stimulation of the vomiting center of the brain by nerve impulses ...

Westminster, Statutes of

(Encyclopedia)Westminster, Statutes of, in medieval English history, legislative promulgations made by Edward I in Parliament at Westminster. Westminster I (1275) practically constitutes a code of law; it covers a ...

Cannon, Annie Jump

(Encyclopedia)Cannon, Annie Jump, 1863–1941, American astronomer, b. Dover, Del. In 1897 she became an assistant in the Harvard College Observatory, where (1911–38) she was astronomer and curator of astronomica...

meiosis

(Encyclopedia)CE5 Formation of sperm cells through meiosis meiosis mīŏˈsĭs [key], process of nuclear division in a living cell by which the number of chromosomes is reduced to half the original number. Meio...

memory, in psychology

(Encyclopedia)memory, in psychology, the storing of learned information, and the ability to recall that which has been stored. It has been hypothesized that three processes occur in remembering: perception and regi...

Guantánamo

(Encyclopedia)Guantánamo gwäntäˈnämō [key], city (1994 est. pop. 200,000), capital of Guantánamo prov., SE Cuba, on the Guaso River. It is the processing center for a rich sugar- and coffee-producing region ...

watercolor painting

(Encyclopedia)watercolor painting, in its wider sense, refers to all pigments mixed with water rather than with oil and also to the paintings produced by this process; it includes fresco and tempera as well as aqua...

canning

(Encyclopedia)canning, process of hermetically sealing cooked food for future use. It is a preservation method, in which prepared food is put in glass jars or metal cans that are hermetically sealed to keep out air...