| Noun | 1. | resistance unit - the reciprocal of conductance electromagnetic unit, emu - any of various systems of units for measuring electricity and magnetism abohm - a unit of resistance equal to a billionth of an ohm ohm - a unit of electrical resistance equal to the resistance between two points on a conductor when a potential difference of one volt between them produces a current of one ampere megohm - a unit of resistance equal to one million ohms |