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The pivoted horizontal crossbar to which the harness traces of a draft animal are attached and which is in turn attached to a vehicle or an implement. Also called regionally whiffletree, whippletree.
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.
(Horse Training, Riding & Manège) a variant, esp US and Austral, of swingletree
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
whif•fle•tree(ˈʰwɪf əlˌtri, ˈwɪf-)
Northern U.S. a crossbar, pivoted at the middle, to which the traces of a harness are fastened for pulling a vehicle or a plow. Also called whippletree , singletree.
[1820–30; variant of whippletree]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
A beam of wood, about three feet long with hooks on each end to which harness Tugs or Traces were attached. The middle of the singletree was attached to either an Evener or a one-horse implement.
1001 Words and Phrases You Never Knew You Didn’t Know by W.R. Runyan Copyright © 2011 by W.R. Runyan