#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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