noun (n)

• a contraceptive device consisting of a flexible dome-shaped cup made of rubber or plastic; it is filled with spermicide and fitted over the uterine cervix(noun.artifact)

  Synonym:
  contraceptive diaphragm, diaphragm
  

  source: wordnet30
• An instrument or device to be introduced into and worn in the vagina, to support the uterus, or remedy a malposition.(noun)

  source: webster1913