abrasion

The act of abrading, wearing, or rubbing off; the wearing away by friction.

(obsolete) The substance thus rubbed off; debris.

(geology) The effect of mechanical erosion of rock, especially a river bed, by rock fragments scratching and scraping it.

An abraded, scraped, or worn area.

(medicine) A superficial wound caused by scraping; an area of skin where the cells on the surface have been scraped or worn away.

(dentistry) The wearing away of the surface of the tooth by chewing.