abrasive; abrasive material
Technical and industrial term for materials used for grinding, polishing, or cutting, such as sandpaper, grinding wheels, or polishing compounds.
This abrasive is used to smooth metal surfaces.
The finer the abrasive particles, the cleaner the finish.
Compound of 研磨 (grinding, polishing) and 材 (material). The exact historical derivation is uncertain, but the word follows a common pattern for technical terms.