#girdle  an encircling or ringlike structure
  supertype:  #skeletal_structure  any structure created by the skeleton of an organism
  subtype:  #pectoral_girdle  a skeletal support to which the forelimbs of vertebrates are attached
  subtype:  #pelvis__pelvic_girdle__pelvic_arch__hip  the structure of the vertebrate skeleton supporting the lower limbs in humans and the hind limbs or corresponding parts in other vertebrates

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