(Agriculture) the part of a flail that strikes the grain
[C15 swipyl, variant of swepyl, from swep(en) to sweep + -yl, suffix denoting an instrument]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
The part of a Flail used to hit the grain being threshed with a flail.
1001 Words and Phrases You Never Knew You Didn’t Know by W.R. Runyan Copyright © 2011 by W.R. Runyan