Source : Webster's Revised Unabridged Dictionary (1913)

Rowel \Row"el\, v. t. [imp. & p. p. {Roweled}or {Rowelled}; p.
   pr. & vb. n. {Roweling} or {Rowelling}.] (Far.)
   To insert a rowel, or roll of hair or silk, into (as the
   flesh of a horse). --Mortimer.