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opalesce

[oh-puh-les]
verb (used without object), o·pal·esced, o·pal·esc·ing.
  1. to exhibit a play of colors like that of the opal.
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Origin of opalesce

First recorded in 1810–20; back formation from opalescent
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for opalesce

opalesce

verb
  1. (intr) to exhibit a milky iridescence
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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