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Scraps of broken or waste glass gathered for remelting, especially with new material.
[Probably alteration of collet, neck of glass left on the blowing iron, from French, collar, diminutive of col, neck, from Old French, from Latin collum; see kwel- in Indo-European roots.]
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.
(Ceramics) waste glass for melting down to be reused
[C17: perhaps variant of collet (literally: little neck, referring to the glass neck of newly blown bottles, etc)]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
broken or waste glass suitable for remelting.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
n → Bruchglas nt
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007