ABRASION

ABRA'SION, noun abra'zhun. The act of wearing or rubbing off; also substance worn off by attrition.

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abrasion. Abrasion, n. a rubbing, wearing or scraping off

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