Exfoliation
Part of speech: noun
Definition: The scaling off of a bone, a rock, or a mineral, etc.; the state of being exfoliated. The loss of leaves from a plant. The removal of a layer of skin, as in cosmetic preparation.
Scurf
Part of speech: noun
Definition: a skin diseasethe flakes of skin that fall of as a result of a skin diseaseany crust-like formations on the skin