Bentonite

ahd-5
  • noun. An absorbent aluminum silicate clay formed from volcanic ash and used in various adhesives, cements, and ceramic fillers.
  • The Century Dictionary and Cyclopedia
  • noun. A variety of clay occurring extensively in the Fort Benton strata of the Cretaceous of Wyoming.
  • the GNU version of the Collaborative International Dictionary of English
  • noun. an absorbent aluminum silicate clay formed from volcanic ash.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • noun. Any of several impure clay minerals consisting mostly of montmorillonite.
  • noun. A porous clay formed by the decomposition of volcanic ash that swells 5 to 6 times its original volume in the presence of water.
  • WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • noun. an absorbent aluminum silicate clay formed from volcanic ash
  • Word Usage
    "Bentonite is a primary montmorillonite clay mined in the U.S.A., but the term bentonite is often used for other commercial montmorillonite clays as well."
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    clay  
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