an absorbent clay, used especially for removing grease from fabrics, in fulling cloth, as a filter, and as a dusting powder.
Origin of fuller's earth
First recorded in 1515–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a natural absorbent clay used, after heating, for decolorizing oils and fats, fulling cloth, etc
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
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.