(of a rock) composed mainly of light-colored minerals.
Origin of leucocratic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
(of igneous rocks) light-coloured because of a low content of ferromagnesian minerals
Word Origin for leucocratic
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