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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 py·ro·lu·site /ˌpaɪroˈluˌsaɪt/
 軟錳礦; 軟鐵礦

From: Webster's Revised Unabridged Dictionary (1913)

 Pyr·o·lu·site n.  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).
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From: WordNet (r) 2.0

 pyrolusite
      n : a mineral consisting of manganese dioxide; an important
          source of manganese