ex·fo·li·ate /(ˌ)ɛksˈfoliˌet/
 (vi.)剝落,剝脫(vt.)使片狀脫落
 ex·fo·li·ate /-ˈfolɪˌet/ 動詞
 (拉exfoliatus)片狀剝落的,表皮脫落,表皮剝脫
 Ex·fo·li·ate v. i. [imp. & p. p. Exfoliated p. pr. & vb. n. Exfoliating ]
 1. To separate and come off in scales or laminæ, as pieces of carious bone or of bark.
 2. Min. To split into scales, especially to become converted into scales at the result of heat or decomposition.
 Ex·fo·li·ate v. t. To remove scales, laminæ, or splinters from the surface of.
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 exfoliate
      v 1: spread by opening the leaves of
      2: cast off in scales, laminae, or splinters
      3: remove the surface, in scales or laminae
      4: come off in a very thin piece
      5: grow by producing or unfolding leaves; "plants exfoliate"