abrasion

Science Dictionary
abrasion   (ə-brā'zhən)  Pronunciation Key 
  1. The process of wearing away a surface by friction. A rock undergoes abrasion when particles of sand or small pieces of rock are carried across its surface by a glacier, stream, or the wind.

  2. A scraped area on the skin or mucous membranes.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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