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bentonite

[ben-tn-ahyt]

ben·ton·ite

[ben-tn-ahyt]
noun Mineralogy.
a clay formed by the decomposition of volcanic ash, having the ability to absorb large quantities of water and to expand to several times its normal volume.

Origin:
1895–1900; named after Fort Benton, Montana; see -ite1

ben·ton·it·ic [ben-tn-it-ik] , adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Bentonite is always a great word to know.
So is slumgullion. Does it mean:
a scrap or morsel of food left at a meal.
a stew of meat, vegetables, potatoes, etc.
Collins
World English Dictionary
bentonite (ˈbɛntəˌnaɪt)
 
n
a valuable clay, formed by the decomposition of volcanic ash, that swells as it absorbs water: used as a filler in the building, paper, and pharmaceutical industries
 
[C19: from Fort Benton, Montana, USA, where found, + -ite1]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Britannica
Encyclopedia

bentonite

clay formed by the alteration of minute glass particles derived from volcanic ash. It was named for Fort Benton, Mont., near which it was discovered

Learn more about bentonite with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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