noun (n)

• an external body part that projects from the body(noun.body)

  Synonym:
  extremity, member
  

  source: wordnet30
• a natural prolongation or projection from a part of an organism either animal or plant(noun.body)

  Synonym:
  outgrowth, process
  

  source: wordnet30
• a part that is joined to something larger(noun.artifact)

  source: wordnet30
• Something appended to, or accompanying, a principal or greater thing, though not necessary to it, as a portico to a house.(noun)

  source: webster1913