noun (n)

• the dead skin at the base of a fingernail or toenail(noun.body)

  source: wordnet30
• the outer layer of the skin covering the exterior body surface of vertebrates(noun.body)

  Synonym:
  epidermis
  

  source: wordnet30
• hard outer covering or case of certain organisms such as arthropods and turtles(noun.animal)

  Synonym:
  carapace, shell, shield
  

  source: wordnet30
• The scarfskin or epidermis. See Skin.(noun)

  source: webster1913