Pronunciation: (ef"lu-res'),[key] —v.i.,-resced, -resc•ing. 1. to burst into bloom; blossom.
2. Chem. a. to change either throughout or on the surface to a mealy or powdery substance upon exposure to air, as a crystalline substance through loss of water of crystallization.
b. to become incrusted or covered with crystals of salt or the like through evaporation or chemical change.