One side of a battery

The answer to the crossword question “One side of a battery is ANODE” is referring to the terminology used in the field of electrochemistry. The anode is a positively charged electrode and one of two terminals in a battery. It is the site where oxidation takes place, meaning it is the location where electrons are lost from the electrodes material. In a battery, the anode is represented by the negative sign (-), while the opposite end, the cathode, is represented by the positive sign (+). Together, they form a circuit that allows the flow of electrons from the anode through the battery to the cathode. Therefore, one side of a battery is indeed an anode.