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TAKE THE QUIZpectolite
noun
pec·to·lite
ˈpektəˌlīt
plural -s
: a whitish or grayish monoclinic mineral NaCa2Si3O8(OH) consisting of a basic sodium calcium silicate occurring in crystal aggregates or fibrous masses (hardness 5, specific gravity 2.68–2.78)
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Merriam-Webster unabridged
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- Often used to describe “the march of time,” what does inexorable mean?


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