bentonite

noun

ben·​ton·​ite ˈben-tə-ˌnīt 

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

bentonitic

ˌben-tə-ˈni-tik 

adjective

Examples of bentonite in a Sentence

Recent Examples on the Web

Everything is then sealed with bentonite, a soft, plastic clay that insulates the containers and acts as a buffer against minor movements in the bedrock. —Marta Abbà, Wired News, 23 Apr. 2025

The sulfur and salicylic acid calm things down without stripping my skin, and there’s even charcoal and bentonite clay to go even deeper and pull out gunk. —Jennifer Hussein, Allure, 6 Apr. 2025

Bentonite clay, hyaluronic acid Size: 2.7 oz Pros: Helps soften skin bumps Cons: Might be drying to some This mud mask has a blend of bentonite clay and hyaluronic acid to suck up blackheads, pimples and pollution all while leaving the skin hydrated and non-stripped. —Alanna Martine Kilkeary, Glamour, 3 Mar. 2025

Key ingredients: caffeine, kaolin, bentonite | Fragrance-free: yes Frequently Asked Questions What is the best thing to remove blackheads? —Christa Joanna Lee, Allure, 4 Feb. 2025

Word History

Etymology

Fort Benton, Montana

First Known Use

1898, in the meaning defined above

Rhymes for bentonite

• acolyte
• aconite
• allanite
• alunite
• amberlite
• ammonite
• amorite
• amphitrite
• analyte
• anchorite
• andesite
• anhydrite

Kids Definition

bentonite

noun

ben·​ton·​ite ˈbent-ᵊn-ˌīt 

: an absorbent clay

Medical Definition

bentonite

noun

ben·​ton·​ite ˈbent-ᵊn-ˌīt 

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

bentonitic

ˌbent-ᵊn-ˈit-ik 

adjective