[ ef-luh-res-uhns ]
/ ˌɛf ləˈrɛs əns /
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the state or a period of flowering.
an example or result of growth and development: These works are the efflorescence of his genius.
  1. the act or process of efflorescing.
  2. the resulting powdery substance or incrustation.
Pathology. a rash or eruption of the skin.



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Origin of efflorescence

1620–30; <French <Medieval Latin efflōrēscentia.See effloresce, -ence
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for efflorescence

/ (ˌɛflɔːˈrɛsəns) /


a bursting forth or flowering
chem geology
  1. the process of efflorescing
  2. the powdery substance formed as a result of this process, esp on the surface of rocks
any skin rash or eruption
efflorescent, adjective
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

Scientific definitions for efflorescence

[ ĕf′lə-rĕsəns ]

A whitish, powdery deposit on the surface of rocks or soil in dry regions. It is formed as mineral-rich water rises to the surface through capillary action and then evaporates. Efflorescence usually consists of gypsum, salt, or calcite.
See anthesis.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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