Rowel

Part of speech: noun (n.)

1. The little wheel of a spur, with sharp points. With sounding whip, and rowels dyed in blood. Cowper.

2. A little flat ring or wheel on horses' bits. The iron rowels into frothy foam he bit. Spenser.

3. A roll of hair, silk, etc., passed through the flesh of horses, answering to a seton in human surgery.

Part of speech: verb (v.)

To insert a rowel, or roll of hair or silk, into (as the flesh of a horse). Mortimer.