pessary

 
Pronunciation: /ˈpɛs(ə)ri/

noun (plural pessaries)

  • a small soluble block that is inserted into the vagina to treat infection or as a contraceptive.
  • an elastic or rigid device that is inserted into the vagina to support the uterus.

Origin:

late Middle English: from late Latin pessarium, based on Greek pessos 'oval stone' (used in board games)