one of the rudimentary, splintlike metacarpal or metatarsal bones of the horse or some allied animal, one on each side of the back of each cannon bone.
Origin of splint bone
First recorded in 1695–1705
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for splint bone
one of the rudimentary metacarpal or metatarsal bones in horses and similar animals, occurring on each side of the cannon bone
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