• (dentistry) The wearing away of the surface of the tooth by chewing.
  • (obsolete) The substance thus rubbed off; debris. [First attested in the mid 18th century.]
  • (medicine) A superficial wound caused by scraping; an area of skin where the cells on the surface have been scraped or worn away. [First attested in the mid 20th century.]
  • The act of abrading, wearing, or rubbing off; the wearing away by friction. [First attested in the mid 17th century.]
  • An abraded, scraped, or worn area. [First attested in the mid 20th century.]
  • (geology) The effect of mechanical erosion of rock, especially a river bed, by rock fragments scratching and scraping it. [First attested in the mid 19th century.]

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