Noun
An instrument or device to be introduced into and worn in the vagina, to support the uterus, or remedy a malposition.
A medicinal substance in the form of a bolus or mass, designed for introduction into the vagina; a vaginal suppository.
Source: Webster's dictionaryBecause they occupied both the vagina and the uterus, this type of stem pessary was also known as an interuterine device. Source: Internet
Similarly I will not give to a woman a pessary to cause abortion. Source: Internet