HOUGH-BONY
—was a term formerly used to signify an enlargement of the cap of a horse's hock, whether it was only a thickening of the integument, generally termed a callosity, or an ossification just below it. The phrase, however, is now considered entirely obsolete; and the distinction in those defects much better understood by the appellation of BLOOD SPAVIN, BONE SPAVIN, or CURB, as the case may happen to be.