DICT.TW Dictionary Taiwan

 ef·flo·resce /ˌɛfləˈrɛs/
 (vi.)開花,風化

 Ef·flo·resce v. i.   [imp. & p. p. Effloresced p. pr. & vb. n. Efflorescing ]
 1. To blossom forth.
 2. Chem. To change on the surface, or throughout, to a whitish, mealy, or crystalline powder, from a gradual decomposition, esp. from the loss of water, on simple exposure to the air; as, Glauber's salts, and many others, effloresce.
 3. To become covered with a whitish crust or light crystallization, from a slow chemical change between some of the ingredients of the matter covered and an acid proceeding commonly from an external source; as, the walls of limestone caverns sometimes effloresce with nitrate of calcium in consequence of the action of nitric acid formed in the atmosphere.
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 effloresce
      v 1: burst forth into or as if into flower; "These manifestations
           effloresced in the past" [syn: burst forth]
      2: assume crystalline form; become crystallized [syn: crystallize,
          crystalize, crystalise]
      3: become encrusted with crystals due to evaporation