Noah Webster
Rowel
ROW'EL, noun [Latin rota.]
1. The little wheel of a spur, formed with sharp points.
2. Among farriers, a roll of hair or silk, used as an issue on horses, answering to a seton in surgery.
3. A little flat ring or wheel of plate or iron on horses' bits.
ROW'EL, verb intransitive To insert a rowel in; to pierce the skin and keep open the wound by a rowel