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laumontite

[loh-mon-tahyt]
noun
  1. a white zeolite mineral, chiefly hydrated silicate of aluminum and calcium.

Origin of laumontite

1795–1805; named after F. P. N. G. de Laumont (1747–1834), French mineralogist who discovered it; see -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018