Electrode with smallest dimension of order millimetre or greater.
Note: Electrodes are described by their smallest dimension. Thus, an electrode of \(\pu{1 \upmu\!m \times 1 mm}\) is termed a ‘microelectrode’.
Source:
PAC, 2020, 92, 641. 'Terminology of Electrochemical Methods of Analysis (IUPAC Recommendations 2019)' on page 655 (https://doi.org/10.1515/pac-2018-0109)