Definition from Wiktionary, the free dictionary
bentonite (plural bentonites)
- (mineralogy) Any of several impure clay minerals consisting mostly of montmorillonite.
- A porous clay formed by the decomposition of volcanic ash that swells 5 to 6 times its original volume in the presence of water.
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Translations to be checked
bentonite f (plural bentoniti)
- (mineralogy) bentonite
- Krueger, Dennis (December 1982). "Why On Earth Do They Call It Throwing?" Studio Potter Vol. 11, Number 1. (etymology)