#nail.horny_structure  horny plate covering and protecting part of the dorsal surface of the digits
  supertype:  #horny_structure__hornystructure__unguis  any rigid body structure composed primarily of keratin
  part:  #lunule  #matrix.animal_tissue
  part of:  #integumentary_system  #digit.extremity
  subtype:  #fingernail  the nail at the end of a finger
     subtype:  #thumbnail  the nail of the thumb
  subtype:  #toenail  the nail at the end of a toe
     subtype:  #ingrown_toenail__ingrowntoenail__onyxis  toenail having its free tip or edges embedded in the surrounding flesh

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