conductor - a device designed to transmit electricity, heat, etc.

filament - a thin wire (usually tungsten) that is heated white hot by the passage of an electric current

jumper cable, jumper lead, lead - a jumper that consists of a short piece of wire; "it was a tangle of jumper cables and clip leads"

lead-in - wire connecting an antenna to a receiver or a transmitter to a transmission line

patchcord - a length of wire that has a plug at each end; used to make connections at a patchboard

telegraph line, telegraph wire, telephone line, telephone wire - the wire that carries telegraph and telephone signals