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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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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At other places the banks were banded with great veins of iron ore, laid bare by the abrasion of the river. The sudden arrest of his motion, the abrasion of one of his hands on the gravel, restored him, and he wept with delight. The ring-finger had suffered a slight abrasion, and the stain of the blood was still visible and unchanged after forty-one years. |
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