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单词 bentonite
释义

WordReference Random House Unabridged Dictionary of American English © 2024
ben•ton•ite  (bentn īt′),USA pronunciation n. [Mineral.]
  1. Mineralogya 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.
  • see -ite1 1895–1900; named after Fort Benton, Montana
ben•ton•it•ic  (ben′tn itik),USA pronunciation adj. 
Collins Concise English Dictionary © HarperCollins Publishers::
bentonite /ˈbɛntəˌnaɪt/ n
  1. 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
Etymology: 19th Century: from Fort Benton, Montana, USA, where found, + -ite1
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