cornified

/ˈkɔːrnɪfaɪd/
adjective
  1. Having become hard and tough, like horn or keratin; used especially of skin or tissue.
    • After weeks of manual labor, his palms developed a cornified surface.
    • The reptile's scales are made of cornified material.
    • The cornified layer of the skin protects the body from germs.
Synonyms
What does "cornified" mean? | whatsthatwordmean | whatsthatwordmean