Abrasion
Abrasion ({not transcribed}) , noun
[Latin abrasio, from 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.
(a) (Medicine) A superficial excoriation of skin or mucous membranes.
(b)
(Medicine) Erosion of the tooth substance — AS