/kon'duk tiv"i tee/ , n. , pl. conductivities .
1. Physics. the property or power of conducting heat, electricity, or sound.
2. Also called specific conductance . Elect. a measure of the ability of a given substance to conduct electric current, equal to the reciprocal of the resistance of the substance. Symbolically represented by the small greek letter Sigma.
[ 1830-40; CONDUCTIVE + -ITY ]