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[ef-luh-res] /ˌɛf ləˈrɛs/
verb (used without object), effloresced, efflorescing.
to burst into bloom; blossom.
  1. 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.
  2. to become incrusted or covered with crystals of salt or the like through evaporation or chemical change.
Origin of effloresce
1765-75; < Latin efflōrēscere to blossom out, equivalent to ef- ef- + flōrēscere to begin to bloom (flōr(i)-, stem of flōs flower + -ēscere -esce) Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for effloresce


verb (intransitive)
to burst forth into or as if into flower; bloom
to become powdery by loss of water or crystallization
to become encrusted with powder or crystals as a result of chemical change or the evaporation of a solution
Word Origin
C18: from Latin efflōrēscere to blossom, from flōrēscere, from flōs flower
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for effloresce

"to come into flower," 1775, from Latin efflorescere "to blossom, spring up, flourish, abound," from ex "out" (see ex-) + florescere "to blossom," from flos (see flora).

Online Etymology Dictionary, © 2010 Douglas Harper
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effloresce in Medicine

effloresce ef·flo·resce (ěf'lə-rěs')
v. ef·flo·resced, ef·flo·resc·ing, ef·flo·resc·es

  1. To blossom; bloom.

  2. To become a powder by losing water of crystallization, as when a hydrated crystal is exposed to air.

ef'flo·res'cence n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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