cummingtonite

/ˈkʌm.ɪŋ.təˌnaɪt/

KɅM · ɪŋ · tənaɪt (3 syllables)

English Noun

Definition

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

Etymology

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