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sylvinite

noun
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syl·​vin·​ite | \ ˈsilvəˌnīt \
plural -s

Definition of sylvinite

: rock that contains chiefly potassium chloride though in an impure state

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History and Etymology for sylvinite

sylvin + -ite

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“Sylvinite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sylvinite. Accessed 21 Oct. 2020.

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