denudation

noun

de·​nu·​da·​tion ˌdē-n(y)ü-ˈdā-shən  ˌden-yu̇- 

: the act or process of removing surface layers (as of skin) or an outer covering (as of myelin)

also : the condition that results from this

denude

di-ˈn(y)üd 

transitive verb

denuded; denuding