exfoliation

noun
ex·fo·li·a·tion | \ (ˌ)eks-ˌfō-lē-ˈā-shən \

Medical Definition of exfoliation 

: 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

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