Cathode current refers to the movement of electrons from a cathode to an anode. It can also be referred to as cathodic current or cathode flow. In electrochemistry, it can be called reduction current as it involves the gaining of electrons. Alternatively, it can be referred to as negative current as the cathode is the negatively charged electrode in a battery or circuit. In electronic engineering, it can be referred to as electron drain current or electron flow current, as it involves the movement of electrons. Overall, the terms used to describe cathode current vary depending on the field of study or industry in which it is referenced.