efflorescence

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efflorescence:

see hydratehydrate
, chemical compound that contains water. A common hydrate is the familiar blue vitriol, a crystalline form of cupric sulfate. Chemically, it is cupric sulfate pentahydrate, CuSO4·5H2O.
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Efflorescence

A deposit, usually white, formed on the surface of a brick, block, or concrete wall; it consists of salts leached from the surface of the wall.

efflorescence

[‚ef·lə′res·əns]
(botany)
The period or process of flowering.
(chemistry)
The property of hydrated crystals to lose water of hydration and crumble when exposed to air.
(materials)
A crust of salts, usually white, that forms on the surface of stone, brick, plaster, or mortar because of leaching of free alkalies from adjacent concrete or mortar.
(mineralogy)
A whitish powder, consisting of one or several minerals produced as an encrustation on the surface of a rock in an arid region. Also known as bloom.

efflorescence

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.

efflorescence

1. Chem Geology
a. the process of efflorescing
b. the powdery substance formed as a result of this process, esp on the surface of rocks
2. any skin rash or eruption
References in periodicals archive ?
She described it as a unique form of lovemaking, a "metaphysical conceit for the union of two people expressing themselves bodily," yet these white efflorescences are as fluffy and dazzling as any cloud study by Constable.