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colloidal

[kuh-loid-l]
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adjective Physical Chemistry.
  1. pertaining to or of the nature of a colloid: colloidal gold and silver.
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Origin of colloidal

First recorded in 1860–65; colloid + -al1
Related formscol·loi·dal·i·ty [kol-oi-dal-i-tee] /ˌkɒl ɔɪˈdæl ɪ ti/, nouncol·loi·dal·ly, adverbnon·col·loi·dal, adjectivesem·i·col·loi·dal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for colloidal

colloidal

adjective
  1. of, denoting, or having the character of a colloid
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Derived Formscolloidality (ˌkɒlɔɪˈdælɪtɪ), noun
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

Word Origin and History for colloidal

adj.

1861, from colloid + -al (1).

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Online Etymology Dictionary, © 2010 Douglas Harper