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. [ 1913 Webster ]
2. The substance rubbed off. Berkeley. [ 1913 Webster ]
3. (Med.) (a) A superficial excoriation of skin or mucous membranes. AS (b) Erosion of the tooth substance AS [ 1913 Webster ]