su·per·con·duct·ing. adj. Exhibiting superconductivity.

What is the meaning of superconducting?

: a complete disappearance of electrical resistance in a substance especially at very low temperatures.

What is a superconducting state?

In Superconducting state, the superconducting material shows the zero electric resistance (infinite conductivity). When the sample of a superconducting material is cooled below its critical temperature/transition temperature, its resistance reduces suddenly to zero. For example Mercury shows zero resistance below 4k.