Electrical resistance
Electrical resistance is a ratio of the degree to which an object opposes an electric current through it, measured in ohms. Its reciprocal quantity is electrical conductance measured in siemens.
Electricity and Magnetism
Wikipedia
http://dbpedia.org/page/Electrical_resistance_and_conductance
ODM2 Units Type Controlled Vocabulary
ODM2 Working Group
A vocabulary for describing the type of the Unit or the more general quantity that the Unit represents.