Sample preparation in which a sample is polished by a cylinder in order to expose compositional changes below the original sample surface, with the intent that the depth of these layers can be related to the position on the surface created by the cylinder.
Source:
PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1810 (https://doi.org/10.1515/pac-2019-0404)