noun (n)

• the small projection of a mammary gland(noun.body)

  Synonym:
  mamilla, mammilla, pap, teat, tit
  

  source: wordnet30
• a flexible cap on a baby's feeding bottle or pacifier(noun.artifact)

  source: wordnet30
• The protuberance through which milk is drawn from the breast or mamma; the mammilla; a teat; a pap.(noun)

  source: webster1913