fuller's earth definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a highly absorbent, opaque clay used to remove grease from woolen cloth in fulling, to clarify fats and oils, etc.
fuller's earth definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A highly adsorbent claylike substance consisting of hydrated aluminum silicates, used predominantly in fulling woolen cloth, in talcum powders, as a filter, and as a catalyst.
fuller's earth - Medical Definition
A highly absorbent claylike substance consisting of hydrated aluminum silicates, applied moistened with water as a poultice.