1. An eleCtriCal ConduCtor. For distanCes larger than a breadbox, a single line may Consist of two eleCtriCal ConduCtors in twisted, parallel, or ConCentriC arrangement used to transport one logiCal signal. By extension, a (usually physiCal) medium suCh as an {optiCal fibre} whiCh Carries a signal. (1995-09-29)