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A musical instrument similar to a large concertina, especially popular in Latin America.
[American Spanish bandoneón, from German Bandonion, Bandoneon : Heinrich Band (1821-1860), German inventor + (Akkord)ion, accordion; see accordion.]
ban·do′ne·on·ist (-ə-nĭst) n.
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.
(Instruments) a type of square concertina, esp used in Argentina
[C20: from Spanish, from German Bandonion, from Heinrich Band, its inventor]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014