A disease of horses characterized by a bony swelling developed on the hock as the result of inflammation of the bones; also, the swelling itself. The resulting lameness is due to the inflammation, and not the bony tumor as popularly supposed.
Name given to degerative arthritis of the lower joints of the hock, characterized by a bony swelling which can be felt on the front and inside of the hock. See also bog spavin.
An unsoundness of the hock, which can involve soft tissues (bog spavin) or bone (bone spavin or jack spavin).