acmite

[ak-mahyt]

noun

1. a rare pyroxene mineral, sodium-ferric iron silicate, NaFe(Si 2 O6 ), found in feldspathoid rocks.

Word History and Origins

Origin of acmite¹

1830–40; < Greek akm ( ḗ ) sharp point + -ite ¹

Example Sentences

Acmite is a characteristic constituent of igneous rocks rich in soda, such as nepheline-syenites, phonolites, &c.

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Although exhibiting certain varietal differences, the essential identity of acmite and aegirite has long been established, but the latter and more recent name is pethaps in more general use, especially among petrologists.

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