abrasion
noun specialized uk/əˈbreɪ.ʒən/ us/əˈbreɪ.ʒən/
[ U ] geology, engineering 磨损，磨耗;擦伤
the process of rubbing away the surface of something
There seems to have been some abrasion of the surface. 表面好像有些磨损。
[ C ] medical （皮肤）擦伤处;（表层）磨损处
a place where the surface of something, such as skin, has been rubbed away
She had a small abrasion on her knee. 她的膝盖擦伤了一小块。