pes·sa·ry 
(pĕsə-rē)
(pĕsə-rē)n. pl. pes·sa·ries
1. Any of various devices worn in the vagina to support or correct the position of the uterus or rectum.
2. A contraceptive diaphragm.
3. A medicated vaginal suppository.
[Middle English pessarie, from Late Latin pessārium, from pessus, pessum, from Greek pessos, oval-shaped stone, pessary.]