[ swey-bak ]
/ ˈsweɪˌbæk /
Veterinary Pathology


an excessive downward curvature of the spinal column in the dorsal region, especially of horses.


Origin of swayback

An Americanism dating back to 1865–70; sway + back1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for sway-back

  • Some woodworkers give their saws a slight camber, or belly, to correspond with the sway-back.

    Farm Mechanics|Herbert A. Shearer

British Dictionary definitions for sway-back



vet science an abnormal sagging or concavity of the spine in older horses
a paralytic disease of new-born and young lambs caused by demyelination of the central nervous system due to copper deficiency

Derived forms of sway-back

sway-backed, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012