exuviate
  (vt.)(vi.)蛻皮,脫殼脫下的殼
  Ex·u·vi·ate v. i. [imp. & p. p. Exuviated, p. pr. & vb. n. Exuviating.]  Zoöl. To she
  d an old covering or condition preliminary to taking on a new one; to molt.
     There is reason to suppose that very old crayfish do not exuviate every year.   --Huxley.
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  exuviate
       v : cast off hair, skin, horn, or feathers; "out dog sheds every
           Spring" [syn: shed, molt, moult, slough]