Ab*ra"sion (#), n. [L. abrasio, fr. abradere. See Abrade.]
1.
The act of abrading, wearing, or rubbing off; the wearing away by friction; as, the abrasion of coins.
2.
The substance rubbed off.
Berkeley.
3. Med.
A superficial excoriation, with loss of substance under the form of small shreds.
Dunglison.
© Webster 1913.