plural -s
: a pale yellow or greenish clay mineral that consists chiefly of hydrous iron silicate and is classed as montmorillonite in which iron has replaced more or less of the aluminum

Word History


French nontronite, from Nontron, town in southwest France + French -ite

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Dictionary Entries Near nontronite

Cite this Entry

“Nontronite.” Dictionary, Merriam-Webster, Accessed 12 Jun. 2024.

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