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[kuh n-duhk-shuh n] /kənˈdʌk ʃən/
the act of conducting, as of water through a pipe.
  1. the transfer of heat between two parts of a stationary system, caused by a temperature difference between the parts.
  2. transmission through a conductor.
  3. conductivity.
Physiology. the carrying of sound waves, electrons, heat, or nerve impulses by a nerve or other tissue.
1530-40; < Latin conductiōn- (stem of conductiō) a bringing together, a hiring, equivalent to conduct(us) (see conduct) + -iōn- -ion
Related forms
conductional, adjective
preconduction, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for conduction
  • Copper's excellent conduction of electricity and heat means that it is used not only to cable and pipe the globe.
  • Heat is lost from the surface of an object through radiation, conduction, convection and evaporation.
  • Eg heat conduction of metals, plastic and in vacuum.
  • When you speak, sound energy spreads in the air around you and reaches your cochlea through your external ear by air conduction.
  • But there's also heat loss by conduction in the interface of brine and fresh water.
  • Arrhythmias are caused by problems with the heart's electrical conduction system.
  • The image of the conduction angle is derived from amplifying a sinusoidal signal.
  • It is responsible for conduction of water and inorganic solutes.
  • Nerve conduction tests will positively determine the level of compression, if any.
British Dictionary definitions for conduction


the transfer of energy by a medium without bulk movement of the medium itself: heat conduction,, electrical conduction,, sound conduction Compare convection (sense 1)
the transmission of an electrical or chemical impulse along a nerve fibre
the act of conveying or conducting, as through a pipe
(physics) another name for conductivity (sense 1)
Derived Forms
conductional, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for conduction

1530s, "hiring;" 1540s, "leading, guidance," from Old French conduction "hire, renting," from Latin conductionem (nominative conductio), noun of action from past participle stem of conducere (see conduce). Sense of "conducting of a liquid through a channel" is from 1610s; in physics, of heat, etc., from 1814.

Online Etymology Dictionary, © 2010 Douglas Harper
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conduction in Medicine

conduction con·duc·tion (kən-dŭk'shən)
The transmission or conveying of something through a medium or passage, especially the transmission of electric charge or heat through a conducting medium without perceptible motion of the medium itself.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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conduction in Science
The transfer of energy, such as heat or an electric charge, through a substance. In heat conduction, energy is transferred from molecule to molecule by direct contact; the molecules themselves do not necessarily change position, but simply vibrate more or less quickly against each other. In electrical conduction, energy is transferred by the movement of electrons or ions. Compare convection. See also radiation.

Our Living Language  : Heat is a form of energy that manifests itself in the motion of molecules and atoms, as well as subatomic particles. Heat energy can be transferred by conduction, convection, or radiation. In conduction heat spreads through a substance when faster atoms and molecules collide with neighboring slower ones, transferring some of their kinetic energy to them. This is how the handle of a teaspoon sticking out of a cup of hot tea eventually gets hot, though it is not in direct contact with the hot liquid. When a fluid is heated, portions of the fluid near the source of the heat tend to become less dense and expand outward, causing currents in the fluid. When these less dense regions rise, cooler portions flow in to take their place, which are then themselves subject to heating. This current flow is called convection. Many ocean currents are convection currents caused by the uneven heating of the ocean waters by the Sun. Radiation transmits heat in the form of electromagnetic waves, especially infrared waves, which have a lower frequency than visible light but a higher frequency than microwaves. Atoms and molecules in a substance struck by such radiation readily absorb the energy from these waves, thereby increasing their own kinetic energy and thus the temperature of the substance.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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conduction in Culture

conduction definition

Transfer of energy through a medium (for example, heat or electricity through metal) without any apparent change in the medium.

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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