a·bra·sion /əˈbreʒən/ 名詞
 擦除, 擦破, 磨損, 磨耗


 Ab·ra·sion n.
 1. The act of abrading, wearing, or rubbing off; the wearing away by friction; as, the abrasion of coins.
 2. The substance rubbed off.
 3. Med. (a) A superficial excoriation of skin or mucous membranes. --AS  (b) Erosion of the tooth substance --AS

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 abrasion
      n 1: an abraded area where the skin is torn or worn off [syn: scratch,
            scrape, excoriation]
      2: erosion by friction [syn: attrition, corrasion, detrition]
      3: the wearing down of rock particles by friction due to water
         or wind or ice [syn: grinding, attrition, detrition]