conductor
n. countable B2 Upper Intermediate US //kənˈdəktɝ// UK //kəndˈʌktɐ// con·duc·tor
n. a person who leads an orchestra or choir, or a material that allows heat or electricity to flow through it easily.
n. a person who directs the performance of an ensemble; alternatively, a substance or medium that transmits heat, electricity, or sound.
Copper is an excellent conductor of electricity.
The conductor raised her baton, and the entire orchestra began to play the first movement in perfect unison.
In high-voltage applications, engineers must select a conductor with low resistance to minimize energy loss and prevent the system from overheating during peak demand.
Borrowed from Middle French conductour, from Old French conduitor, from Latin conductor.
Usage
Commonly followed by the preposition 'of' when referring to physical materials.