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efflorescence

 - 4 dictionary results
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ef⋅flo⋅res⋅cence

  [ef-luh-res-uhns]
Use efflorescence in a Sentence
–noun
1. the state or a period of flowering.
2. an example or result of growth and development: These works are the efflorescence of his genius.
3. Chemistry.
a. the act or process of efflorescing.
b. the resulting powdery substance or incrustation.
4. Pathology. a rash or eruption of the skin.
Origin:
1620–30; < F < ML efflōrēscentia. See effloresce, -ence
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Efflorescence Cleaner
Clean efflorescence from concrete and bricks. Avoid dangerous acids.
www.RadonSeal.com
Efflorescence
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ef·flo·res·cence   (ěf'lə-rěs'əns)   
n.  

  1. Botany A state or time of flowering; anthesis.

    1. A gradual process of unfolding or developing.

    2. The highest point; the culmination. See Synonyms at bloom1.

    3. The deposit that results from the process of efflorescing. Also called bloom1.

    4. The process of efflorescing.

    5. A growth of salt crystals on a surface caused by evaporation of salt-laden water.

  3. Chemistry

    1. The deposit that results from the process of efflorescing. Also called bloom1.

    2. The process of efflorescing.

    3. A growth of salt crystals on a surface caused by evaporation of salt-laden water.

  4. Pathology Redness, a rash, or an eruption on the skin.

ef'flo·res'cent adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: ef·flo·res·cence
Pronunciation: "ef-l&-'res-&n(t)s
Function: noun
1 : the process ofefflorescing; also : the powder or crust so formed
2 : a redness of the skin or an eruption (as in a rash) —ef·flo·res·cent /-&nt/ adjective
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Encyclopedia

efflorescence

spontaneous loss of water by a hydrated salt, which occurs when the aqueous vapor pressure of the hydrate is greater than the partial pressure of the water vapour in the air. For example, because the vapour pressures of washing soda (Na2CO310H2O) and Glauber's salt (Na2SO410H2O) normally exceed that of the water vapour in the atmosphere, these salts effloresce (i.e., lose all or part of their water of hydration), and their surfaces assume a powdery appearance. Hydrated cupric sulfate, or blue vitriol (CuSO45H2O), the aqueous vapour pressure of which is lower, undergoes efflorescence only if the air in contact with it is relatively dry. See also deliquescence.

Learn more about efflorescence with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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