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pinakiolite
noun
pi·nak·i·o·lite
\pə̇ˈnakēəˌlīt\
Definition of pinakiolite
-s
: a magnesium and manganese borate Mg3Mn3B2O10 occurring in small black tabular crystals
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Origin and Etymology of pinakiolite
German pinakiolith, from Greek pinakion small tablet (diminutive of pinak-, pinax board, tablet) + German -lith -lite
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