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leucocratic

[loo-kuh-krat-ik]
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adjective Geology.
  1. (of a rock) composed mainly of light-colored minerals.
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Origin of leucocratic

leuco- + -crat + -ic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for leucocratic

leucocratic

adjective
  1. (of igneous rocks) light-coloured because of a low content of ferromagnesian minerals
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Word Origin

C20: from German leukokrat, from leuco- + Greek kratein to rule
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