Quittor

noun

1. An inflammation of the hoof cartilage of horses and other solid-hoofed animals, characterized by degeneration of hoof tissue, formation of a slough, and fistulous sores.
2. See quitter.
3. A chronic abscess, or fistula of the coronet, in a horse's foot, resulting from inflammation of the tissues investing the coffin bone.
4. A chronic abscess, or fistula of the coronet, in a horse's foot, resulting from inflammation of the tissues investing the coffin bone.