pyrolusite

noun py·ro·lu·site \ ˌpī-rō-ˈlü-ˌsīt \

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

Origin and Etymology of pyrolusite

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


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the quality or fact of being simultaneous

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