Cummingtonite Definition

noun

(mineralogy) A mineral, magnesium-iron silicate hydroxide, (Mg,Fe)7Si8O22(OH)2.

Wiktionary

Other Word Forms of Cummingtonite

Noun

Singular:
cummingtonite
Plural:
cummingtonites

Origin of Cummingtonite

  • Cummington +‎ -ite, since it was originally discovered in Cummington, Massachusetts.

    From Wiktionary

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