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diallage

[dahy-uh-lij]
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noun Mineralogy.
  1. a variety of diopside with a laminated structure, found in gabbro and other igneous rocks.
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Origin of diallage

1795–1805; < French < Greek diallagḗ interchange, change, noun derivative from base of diallássein make an exchange, equivalent to di- di-3 + allássein to change, exchange
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for diallage

diallage

noun
  1. a green or brownish-black variety of the mineral augite in the form of layers of platelike crystals
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Word Origin

C19: from Greek diallagē interchange
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