heptaphyllite

noun

hep·​ta·​phyllite
¦heptə+
: any of a group of micas (as muscovite and other light-colored micas) with seven metallic ions per ten oxygen and two hydroxyl ions compare octaphyllite

Word History

Etymology

hepta- + phyllite

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Dictionary Entries Near heptaphyllite

heptanone

heptaphyllite

heptaploid

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Cite this Entry

“Heptaphyllite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heptaphyllite. Accessed 27 Mar. 2023.

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