1. An excoriation, or circumscribed removal of the superficial layers of skin or mucous membrane.
2. A scraping away of a portion of the surface.
3. In dentistry, the pathologic grinding or wearing away of tooth substance by incorrect tooth-brushing methods, the presence of foreign objects, bruxism, or similar causes.
The information shown above for abrasion is provided by Stedman's.
* Stedman's, part of Lippincott Williams & Wilkins, provide a comprehensive line of health-science publications for healthcare professionals and medical students.