exfoliation

noun

ex·​fo·​li·​a·​tion (ˌ)eks-ˌfō-lē-ˈā-shən 

: the action or process of exfoliating: as

a

: the peeling of the horny layer of the skin (as in some skin diseases)

b

: the shedding of surface components (as cells from internal body surfaces)

c

: the shedding of a superficial layer of bone or of a tooth or part of a tooth

exfoliative

eks-ˈfō-lē-ˌāt-iv 

adjective