#quill.rib__calamus__shaft  the hollow shaft of a feather
  supertype:  #rib.anatomical_structure  a riblike supporting or strengthening part of an animal or plant
  part of:  #feather__plume__plumage  the light horny waterproof structure forming the external covering of birds
     part of:  #bird  warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings

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