1. (

• abrasion ,
• scratch ,
• scrape ,
• excoriation

) an abraded area where the skin is torn or worn off ;

2. (

• abrasion ,
• attrition ,
• corrasion ,
• detrition

) erosion by friction ;

3. (

• grinding ,
• abrasion ,
• attrition ,
• detrition

) the wearing down of rock particles by friction due to water or wind or ice ;