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pyrolusite

noun
py·​ro·​lu·​site | \ ˌpī-rō-ˈlü-ˌsīt How to pronounce pyrolusite (audio) \

Definition of pyrolusite

: a soft black or steel-gray mineral of metallic luster consisting of manganese dioxide that is the most important ore of manganese

First Known Use of pyrolusite

1828, in the meaning defined above

History and Etymology for pyrolusite

German Pyrolusit, from Greek pyr- + lousis washing, from louein to wash — more at lye

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More from Merriam-Webster on pyrolusite

Britannica.com: Encyclopedia article about pyrolusite

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