clarain

clar·ain

 (klăr′ān)

n.

A band in bituminous coal, characterized by a sheetlike irregular fracture, a silky luster, and fine intercalations of durain.

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[Latin clārus, bright; see kelə- in Indo-European roots + (fus)ain.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

clarain

(ˈklæreɪn)

n

(Minerals) one of the four major lithotypes of banded coal

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014