#rowel  a small spiked wheel at the end of a spur
  supertype:  #wheel  a simple machine consisting of a circular frame with spokes (or a solid disc) that can rotate on a shaft or axle (as in vehicles or other machines)
  part of:  #gad__spur  a sharp prod fixed to a rider's heel and used to urge a horse onward; "cowboys know not to squat with their spurs on"
     part of:  #boot  footwear that covers the whole foot and lower leg

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