plural -s
: a mineral (Mg1Fe)AlSiAlO5(OH)2 consisting of a silicate of aluminum and ferrous iron with magnesium occurring usually in dull green to gray or grayish black masses of brittle folia and related to the brittle micas (as clintonite)

Word History


German, from chlorit chlorite (mineral) + -oid

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Dictionary Entries Near chloritoid

Cite this Entry

“Chloritoid.” Dictionary, Merriam-Webster, Accessed 29 Nov. 2023.

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