Electrode whose potential changes with an applied potential.
Note: A non-polarizable electrode is an electrode that holds its potential essentially constant by efficiently allowing electric current to pass. This is a desirable characteristic for a reference electrode.
Source:
PAC, 2020, 92, 641. 'Terminology of Electrochemical Methods of Analysis (IUPAC Recommendations 2019)' on page 653 (https://doi.org/10.1515/pac-2018-0109)