#hectometer__hectometre__hm  a metric unit of length equal to 100 meters
  supertype:  #metric_linear_unit  a linear unit of distance in metric terms
  part:  #decameter
  part of:  #kilometer__kilometre__km__klick  a metric unit of length equal to 1000 meters (or 0.621371 miles)
     part of:  #myriameter__myriametre__mym  a metric unit of length equal to 10,000 meters

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