abrasion

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abrasion

Geography the effect of mechanical erosion of rock, esp a river bed, by rock fragments scratching and scraping it; wearing down

abrasion

[ə′brā·zhən]
(engineering)
The removal of surface material from any solid through the frictional action of another solid, a liquid, or a gas or combination thereof.
A surface discontinuity brought about by roughening or scratching.
(geology)
Wearing away of sedimentary rock chiefly by currents of water laden with sand and other rock debris and by glaciers.
(medicine)
A spot denuded of skin, mucous membrane, or superficial epithelium by rubbing or scraping.

abrasion

A surface discontinuity caused by roughening or scratching.