efflorescence
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(botany) The production of flowers.
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(figurative) Rapid flowering of a culture or civilisation etc.
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(construction) An encrustation of soluble salts, commonly white, deposited on the surface of stone, brick, plaster, or mortar; usually caused by free alkalies leached from mortar or adjacent concrete as moisture moves through it.
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(chemistry) The formation of a powdery surface on crystals, as a hydrate is converted to anhydrous form by losing loosely bound water of crystallization to the atmosphere.
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(geology) An encrustation of soluble salts, deposited on rock or soil by evaporation; often found in arid or geothermal environments.
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(pathology) A redness, rash, or eruption on the skin.
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