(obsolete) A splinter, slice, or sliver broken off something.
See how this river comes me cranking in, / And cuts me from the best of all my land / A huge half-moon, a monstrous cantle out.
Their armors forged were of metal frail; / On every side thereof huge cantles flies; / The land was strewed all with plate and mail, / That on the earth, on that their warm blood lies.
The raised back of a saddle.
(Scotland) The top of the head.
(Scotland) On many styles of sporran, a metal arc along the top of the pouch, usually fronting the clasp.