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Broecker, Wallace Smith

(Encyclopedia)Broecker, Wallace Smith brōkˈər [key], 1931–2019, American geophysicist, b. Chicago, Ph.D. Columbia, 1958. He was a member of Columbia's faculty from 1959. In the 1970s he predicted rising temper...

refrigeration

(Encyclopedia)CE5 Compression system of refrigeration refrigeration, process for drawing heat from substances to lower their temperature, often for purposes of preservation. Refrigeration in its modern, portabl...

air navigation

(Encyclopedia)air navigation, science and technology of determining the position of an aircraft with respect to the surface of the earth and accurately maintaining a desired course (see navigation). Basic to air ...

national parks and monuments

(Encyclopedia)CE5 national parks and monuments. The National Park Service, a bureau of the U.S. Dept. of the Interior, was established in 1916 to oversee the administration of 40 national parks and monuments und...

ignition

(Encyclopedia)CE5 Ignition system ignition, apparatus for igniting a combustible mixture. The German engineer Nikolaus A. Otto, in his first gas engine, used flame ignition; another method was heating a metal t...

Farm Credit Administration

(Encyclopedia)Farm Credit Administration (FCA), an independent agency of the executive branch of the federal government that supervises and regulates the Farm Credit System (FCS) for American agriculture. The Farm ...

dendrite

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

ductless gland

(Encyclopedia)ductless gland: see endocrine system; gland. ...

axon

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

vas deferens

(Encyclopedia)vas deferens: see reproductive system; vasectomy. ...