n. & v.
--n.
1. a spiked revolving disc at the end of a spur.
2 a circular piece of leather etc. with a hole in the centre inserted between a horse's skin and flesh to discharge an exudate.
--v.tr. (rowelled, rowelling; US roweled, roweling)
1. urge with a rowel.
2 insert a rowel in.
Etymology: ME f. OF roel(e) f. LL rotella dimin. of L rota wheel