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reverse of a 1981 Italian 100 lire coin depicting the goddess Minerva holding an olive tree
A space on the reverse of a coin or medal, usually below the central design and often giving the date and place of engraving.
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.
(Currencies) a space on the reverse of a coin or medal below the central design, often containing the date, place of minting, etc
[C17: from French, from Medieval Latin exergum, from Greek ex outside + ergon work]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ex•ergue(ɪgˈzɜrg, ˈɛk sɜrg, ˈɛg zɜrg)
the space below the device on a coin or medal.
[1690–1700; < French, appar. < New Latin exergum < Greek ex- ex-3 + érgon work]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.