It was clean but showed fresh blood, and the abrasion looked painful.
abrasion, such as parts of crushing machinery.
Engineers and other craftsmen make extensive use of abrasion, effected by the aid of such abrasives as emery and carborundum, in shaping, finishing and polishing their work.
In machinery, abrasion between moving surfaces has to be prevented as much as possible by the use of suitable materials, good fitting and lubrication.
the resistance of a metal to abrasion by friction.