fuller's-earth

fuller's earth

noun
an absorbent clay, used especially for removing grease from fabrics, in fulling cloth, as a filter, and as a dusting powder.

Origin:
1515–25

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
fuller's earth
 
n
a natural absorbent clay used, after heating, for decolorizing oils and fats, fulling cloth, etc

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

fuller's earth full·er's earth (ful'ərz)
n.
A highly absorbent claylike substance consisting of hydrated aluminum silicates, applied moistened with water as a poultice.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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