variants or less commonly laumonite or lomonite
plural -s
: a white monoclinic mineral CaAl2Si4O12.4H2O consisting of a hydrous calcium and aluminum silicate and having a vitreous luster that upon exposure to the air loses water, becomes opaque, and crumbles

Word History


laumontite, laumonite alteration of lomonite, irregular from F. P. N. G. de Laumont †1834 French mineralogist + English -ite

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Dictionary Entries Near laumontite

Cite this Entry

“Laumontite.” Dictionary, Merriam-Webster, Accessed 18 Jun. 2024.

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