Wiktionary
resistance distance
n. (context mechanics English) In classical mechanics, the distance from the resistance (on a lever) to the fulcrum.
Wikipedia
Resistance distance
In graph theory, the resistance distance between two vertices of a simple connected graph, G, is equal to the resistance between two equivalent points on an electrical network, constructed so as to correspond to G, with each edge being replaced by a 1 ohm resistance. It is a metric on graphs.