noun, plural conductivities.
Physics. the property or power of conducting heat, electricity, or sound.
Also called specific conductance. Electricity. a measure of the ability of a given substance to conduct electric current, equal to the reciprocal of the resistance of the substance. Symbol: σ

1830–40; conductive + -ity Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
conductivity (ˌkɒndʌkˈtɪvɪtɪ)
n , pl -ties
1.  Also called: conduction the property of transmitting heat, electricity, or sound
2.  κ
 a.  a measure of the ability of a substance to conduct electricity; the reciprocal of resistivity
 b.  Formerly called: specific conductance in the case of a solution, the electrolytic conductivity is the current density divided by the electric field strength, measured in siemens per metre
3.  See thermal conductivity

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American Heritage
Medical Dictionary

conductivity con·duc·tiv·i·ty (kŏn'dŭk-tĭv'ĭ-tē)

  1. The ability or power to conduct or transmit heat, electricity, or sound.

  2. The ability of a body structure to transmit an electric impulse, especially the ability of a nerve to transmit a wave of excitation.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
conductivity   (kŏn'dŭk-tĭv'ĭ-tē)  Pronunciation Key 
  1. The ability to transfer heat, electricity, or sound by conduction.

  2. See conductance.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Second, they study how the electrical conductivity of a molecule is affected by
The latest research is instead based on the plume's electrical conductivity.
Water increases the conductivity of the air and so increases the intensity of
  the discharge.
The low thermal conductivity of the polyester blocked his body heat from
  reaching the sensor.
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