desquamate

from WordNet (r) 3.0 (2006)

desquamate
    v 1: peel off in scales; "dry skin desquamates" [syn:
         {desquamate}, {peel off}]

from The Collaborative International Dictionary of English v.0.48

Desquamate \Des"qua*mate\, v. i. [L. desquamatus, p. p. of
   desquamare to scale off; de- + squama scale.] (Med.)
   To peel off in the form of scales; to scale off, as the skin
   in certain diseases.
   [1913 Webster]