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A revolving cylindrical sieve used for screening or sizing rock and ore.
[German, from Middle High German trummel, diminutive of trumme, drum, probably of imitative origin.]
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.
(Mining & Quarrying) a revolving cylindrical sieve used to screen crushed ore
[C19: from German: a drum]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a rotary, cylindrical or conical screen for sorting ore, coal, gravel, etc.
[1875–80, Amer.; < German Trommel drum]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.