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pyrolusite |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Pyrolusite \Pyr`o*lu"site\, n. [Pyro- + Gr ? to loose, or ? a loosing.] (Min.) Manganese dioxide, a mineral of an iron-black or dark steel-gray color and metallic luster, usually soft. Pyrolusite parts with its oxygen at a red heat, and is extensively used in discharging the brown and green tints of glass (whence its name). From WordNet r 1.6 [wn]: pyrolusite n : a mineral consisting of manganese dioxide; an important source of manganese
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