acmite

[ak-mahyt]

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noun

a rare pyroxene mineral, sodium-ferric iron silicate, NaFe(Si2O6), found in feldspathoid rocks.

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Origin of acmite

1830–40; < Greek akm(ḗ) sharp point + -ite¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018