D defs.my
Entry 1 sense Webster, 1913

Conductivity

/(kŏn`dŭk*tĭv"ĭ*ty̆)/ · Con·duc·tiv·i·ty · IPA /kˌɑndˌʌktˈɪvətiː/
01 n. The quality or power of conducting, or of receiving and transmitting, as heat, electricity, etc.; as, the conductivity of a nerve.
  1. 1.
    The quality or power of conducting, or of receiving and transmitting, as heat, electricity, etc.; as, the conductivity of a nerve.
Phrases & compounds
Thermal conductivity — the quantity of heat that passes in unit time through unit area of a plate whose thickness is unity, when its opposite faces differ in temperature by one degree.
Thermometic conductivity — the thermal conductivity when the unit of heat employed is the heat required to raise a unit volume of the substance one degree.