polygranular carbon

A carbon material composed of grains, which can be clearly distinguished by means of optical microscopy.
Industrial carbon materials (such as electrodes) are mostly polygranular, but special grades are agranular materials, such as @G02639@, @C00831@ or @P04963@. Such materials are covered by the term @A00188@.
PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 501 (https://doi.org/10.1351/pac199567030473)