electrical and magnetic quality electric resistance (quality) Quality of a object or substance with the property of resisting opposing the flow of an electrical current. [NCI] 2019-09-20 Changed pref label for uniqueness. [Allotrope] resistance (quality) Electric resistance is the quality inhered in a conductor that is the electric potential difference divided by the electric current when there is no electromotive force in the conductor. [IUPAC] electric resistance (quality) 2020-01-23 Changed definition to IUPAC. [Allotrope] resistance electric resistance PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996))