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The quality or power of conducting, or of receiving and transmitting, as, the conductivity of a nerve. Thermal conductivity (Physics), the quantity of heat that passes in unit time through unit area of plate whose thickness is unity, when its opposite faces differ in temperature by one degree. J. D. Everett. -- Thermo…

of metal or other conductors loosely resting against each other is materially improved in conductivity by the influence of Hertzian waves; -- so called by Sir O. J. Lodge in 1894 on the assumption that the impact of the electic waves caused the loosely connected parts to cohere, or weld together, a condition easily des…

Conductivity; capacity for receiving and transmitting.

Transmission through, or by means of, a conductor; also, conductivity. [The] communication [of heat] from one body to another when they are in contact, or through a homogenous body from particle to particle, constitutes conduction. Amer. Cyc.

A unit of conductivity, being the reciprocal of the ohm.

An instrument for measuring conductivity.

A substance or device that has its conductivity altered in some way by electric waves, as a coherer.

al current or discharge offered by conducting bodies. It bears an inverse relation to the conductivity, -- good conductors having a small resistance, while poor conductors or insulators have a very high resistance. The unit of resistance is the ohm. Resistance box (Elec.), a rheostat consisting of a box or case contain…

oking substance. It exhibits under the action of light a remarkable variation in electric conductivity, and is used in certain electric apparatus. Symbol Se. Atomic weight 78.9.

closed by a conductor of relatively low resistance because shorter or of relatively great conductivity.

e thermal unit; thermal waters. The thermal condition of the earth. J. D. Forbes. Thermal conductivity, Thermal spectrum. See under Conductivity, and Spectrum. -- Thermal unit (Physics), a unit chosen for the comparison or calculation of quantities of heat. The unit most commonly employed is the amount of heat necessa…