Physics. [f. CONDUCTIVE + -ITY: cf. activity, nativity, etc.] Conductive quality; power of conducting heat, electricity, etc.; esp. with reference to its degree.
1837. Whewell, Hist. Induct. Sc. (1857), II. 382. Modified by the conductivity or conducting power.
1863. Tyndall, Heat, ix. 237. The melting distance furnished a measure of the conductivity of the bar.
1881. Nature, No. 620. 465. Crystalline media possessing different conductivities in different directions.
