pessary

Medical device designed to be inserted into the vagina either to support a displaced womb or as a contraceptive. The word is also used for a vaginal suppository used for administering drugs locally, made from glycerol or oil of theobromine, which melts within the vagina to release the contained substance - for example, a contraceptive, antibiotic, antifungal agent, or prostaglandin (to induce labour).