cummingtonite

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

• IPA^(key): /ˈkʌm.ɪŋ.təˌnaɪt/

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cummingtonite (countable and uncountable, plural cummingtonites)

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

• David Barthelmy (1997–2025) “Cummingtonite”, in Webmineral Mineralogy Database.
• “cummingtonite”, in Mindat.org‎^[1], Hudson Institute of Mineralogy, 2000–2025.

Borrowed from English cummingtonite.

• IPA^(key): /kœ.miŋ.tɔ.nit/

cummingtonite f (plural cummingtonites)

1. (mineralogy) Cummingtonite

Borrowed from English cummingtonite.

cummingtonite f (plural cummingtoniti)

1. (mineralogy) cummingtonite