| The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. |
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| pyrolusite |
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| SYLLABICATION: | py·ro·lu·site |
| PRONUNCIATION: |  p  r -l  st |
| NOUN: | A soft, black to dark gray mineral, MnO2, the commonest and most important secondary ore of manganese. | | ETYMOLOGY: | German Pyrolusit : Greek puro-, pyro- + Greek lousis, a washing (from louein, to wash; see leu( )- in Appendix I).
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| The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. |
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