#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
  subtype:  fingernail  toenail
  part of:  integumentary_system  digit.extremity
  part:  lunule__half-moon__lunula  the crescent-shaped area at the base of the human fingernail
  part:  matrix.animal_tissue  the formative tissue at the base of a nail

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