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dumortierite

[doo-mawr-tee-uh-rahyt, dyoo-] /duˈmɔr ti əˌraɪt, dyu-/
noun
1.
a mineral, aluminum borosilicate.
Origin
1880-1885
1880-85; < French, named after Eugène Dumortier, 19th-century French paleontologist; see -ite1
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for dumortierite

dumortierite

/djuːˈmɔːtɪəˌraɪt/
noun
1.
a hard fibrous blue or green mineral consisting of hydrated aluminium borosilicate. Formula: Al7O3BO3(SiO4)3
Word Origin
C19: named after Eugène Dumortier, 19th-century French palaeontologist who discovered it
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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