The Collaborative International Dictionary
Canon bone
Canon bone \Can"on bone`\ [F. canon, fr. L. canon a rule. See canon.] (Anat.) The shank bone, or great bone above the fetlock, in the fore and hind legs of the horse and allied animals, corresponding to the middle metacarpal or metatarsal bone of most mammals. See Horse. [1913 Webster] ||
Wiktionary
canon bone
n. (context anatomy English) The shank bone, or great bone above the fetlock, in the fore and hind legs of the horse and allied animals, corresponding to the middle metacarpal or metatarsal bone of most mammals.