what is an anode

An anode is an electrode of a polarized electrical device through which conventional current enters the device. It is the opposite of a cathode, which is an electrode of the device through which conventional current leaves the device. The terms anode and cathode are not defined by the voltage polarity of electrodes but the direction of current through the electrode. In a device, an anode is an electrode through which conventional current (positive charge) flows into the device from an external circuit. In a battery or galvanic cell, the anode is the negative electrode from which electrons flow. An anode is usually made of a metal that oxidizes and sends electrons to the cathode. It is designed to be more chemically active than the material in the engine lower unit or components under the water.