noun Physics.
the phenomenon of almost perfect conductivity shown by certain substances at temperatures approaching absolute zero. The recent discovery of materials that are superconductive at temperatures hundreds of degrees above absolute zero raises the possibility of revolutionary developments in the production and transmission of electrical energy.

1915–20; super- + conductivity

superconduction [soo-per-kuhn-duhk-shuhn] , noun
superconductive [soo-per-kuhn-duhk-tiv] , superconducting, adjective
superconductor [soo-per-kuhn-duhk-ter] , noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
superconductivity (ˌsuːpəˌkɒndʌkˈtɪvɪtɪ)
physics the property of certain substances that have no electrical resistance. In metals it occurs at very low temperatures, but higher temperature superconductivity occurs in some ceramic materials

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American Heritage
Science Dictionary
superconductivity   (s'pər-kŏn'dŭk-tĭv'ĭ-tē)  Pronunciation Key 
The ability of certain metals or alloys to conduct an electric current with almost no resistance. Superconductivity usually occurs close to absolute zero, at temperatures approaching -459.67°F (-273.15°C), but has also been observed at temperatures as high as -200°F (-128.88°C).

superconductor noun
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
superconductivity [(sooh-puhr-kon-duk-tiv-uh-tee)]

A property of materials by which their electrical resistance goes to zero, and they acquire the ability to carry electric current with no losses whatsoever.

Note: Formerly, materials showed superconductivity only near absolute zero, but new materials have been found that are superconducting at much higher temperatures.
superconductivity [(sooh-puhr-kon-duk-tiv-uh-tee)]

A property of some materials in which their electrical resistance drops to zero, and they acquire the ability to carry electric current with no loss of energy whatsoever. Formerly, materials developed superconductivity only at temperatures near absolute zero, but new materials have been found that remain superconductive at temperatures above those of liquid nitrogen. The goal of current research is to find a material that remains superconductive at room temperature.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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