Columbia Encyclopedia

Search results

500 results found

Adrian, Edgar Douglas Adrian, Baron

(Encyclopedia)Adrian, Edgar Douglas Adrian, Baron, 1889–1977, English physiologist, M.D. Trinity College, Cambridge, 1915. He was research professor (1929–37) of the Royal Society and professor of physiology (1...

Ramón y Cajal, Santiago

(Encyclopedia)Ramón y Cajal, Santiago säntyäˈgō rämōnˈ ē kähälˈ [key], 1852–1934, Spanish histologist, widely considered the father of neuroscience. He was a university professor at Valencia (1881–8...

dendrite

(Encyclopedia)dendrite: see nervous system; synapse. ...

axon

(Encyclopedia)axon: see nervous system; synapse. ...

sympathomimetic drug

(Encyclopedia)sympathomimetic drug sĭmpăthˌōmĭmĕtˈĭk [key], any of a group of substances whose actions resemble the response of stimulated sympathetic nerves (see nervous system). These drugs include epinep...

scopolamine

(Encyclopedia)scopolamine hīˈəsēnˌ, –sĭn [key], alkaloid drug obtained from plants of the nightshade family (Solanaceae), chiefly from henbane, Hyoscyamus niger. Structurally similar to the nerve substance ...

von Euler, Ulf

(Encyclopedia)von Euler, Ulf, 1905–83, Swedish physiologist and pharmacologist, Ph.D. Karolinska Institute, 1930. He was a professor at the Karolinska Institute from 1930 to 1971. Von Euler won the 1970 Nobel Pri...

ecliptic coordinate system

(Encyclopedia)ecliptic coordinate system, an astronomical coordinate system in which the principal coordinate axis is the ecliptic, the apparent path of the sun through the heavens. The ecliptic poles are the two p...

Chinese examination system

(Encyclopedia)Chinese examination system, civil service recruitment method and educational system employed from the Han dynasty (206 b.c.–a.d. 220) until it was abolished by the Ch'ing dowager empress Tz'u Hsi in...

European Monetary System

(Encyclopedia)European Monetary System, arrangement by which most nations of the European Union (EU) linked their currencies to prevent large fluctuations relative to one another. It was organized in 1979 to stabil...