scarification

noun4

1. •
   A medieval form of penance in which the skin was damaged with a knife or hot iron.
2. •
   The scratching, etching, burning / branding, or superficially cutting designs, pictures, or words into the skin as a permanent body modification.
3. •
   A route of administration for some vaccinations and tests: rather than hypodermic injection, the site is inoculated intradermally not with any injection but rather only with small, shallow pricks or scratches; the needle is not hollow.
4. •
   The act of scarifying: raking the ground harshly to remove weeds, etc.