ben·​ton·​ite | \ ˈben-tə-ˌnīt How to pronounce bentonite (audio) \

Definition of bentonite

: an absorptive and colloidal clay used especially as a sealing agent or suspending agent (as of drugs)

Other Words from bentonite

bentonitic \ ˌben-​tə-​ˈni-​tik How to pronounce bentonite (audio) \ adjective

Examples of bentonite in a Sentence

Recent Examples on the Web Aztec Secret’s Indian Healing Clay is a deep-pore-cleansing mask made of 100% natural calcium bentonite clay that reviewers can’t get enough of. Kiana Murden, CNN Underscored, 31 Aug. 2020 OmniTRAX will ship in bentonite, an absorbent clay, from Wyoming. Aldo Svaldi, The Denver Post, 29 Sep. 2019 Waste will be sealed in the copper coffins, placed into the storage shafts, and surrounded by a thick layer of bentonite, a natural clay almost impermeable to water. Tim Heffernan, Popular Mechanics, 10 May 2012 This mask is made with a blend of charcoal, volcanic ash, and kaolin and bentonite clays to remove impurities, exfoliate, absorb excess oils, remove toxins, and reduce inflammation. Tanisha Pina, Allure, 1 Aug. 2018 Our pomades contain pure ingredients such as bentonite, which is mineral enriching for the hair, and hydrogenated castor oil, which works as a non-sticky wax to hold shape. Scott Christian, Esquire, 3 Mar. 2017 Officials suspect the bentonite seeped into groundwater supplies, causing the water wells to become cloudy. Andrew Maykuth,, 8 July 2017 Local officials suspect that nontoxic bentonite clay used as a lubricant during the horizontal-drilling process may have migrated into private wells. Andrew Maykuth,, 7 July 2017 In a memo to the mayor, aldermen and city administrator, Deal said staff members have been using bentonite, an absorbent clay, to stop the leaks temporarily. Kaitlyn Schwers,, 28 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'bentonite.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of bentonite

1898, in the meaning defined above

History and Etymology for bentonite

Fort Benton, Montana

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Time Traveler for bentonite

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The first known use of bentonite was in 1898

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Dictionary Entries Near bentonite



ben trovato

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Cite this Entry

“Bentonite.” Dictionary, Merriam-Webster, Accessed 5 Dec. 2021.

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More Definitions for bentonite


ben·​ton·​ite | \ ˈbent-ᵊn-ˌīt How to pronounce bentonite (audio) \

Medical Definition of bentonite

: an absorptive and colloidal clay used in pharmacy especially to stabilize suspensions

Other Words from bentonite

bentonitic \ ˌbent-​ᵊn-​ˈit-​ik How to pronounce bentonite (audio) \ adjective

More from Merriam-Webster on bentonite Encyclopedia article about bentonite


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