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 of pyrolusite
German Pyrolusit, from Greek pyr- + lousis washing, from louein to wash — more at lye
First Known Use: 1828
Learn More about pyrolusite
Britannica.com: Encyclopedia article about "pyrolusite"
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