Pes"sa*ry (?), n.; pl. Pessaries (#). [L. pessarium, pessum, pessus, Gr. : cf. F. pessaire.] Med. (a)
An instrument or device to be introduced into and worn in the vagina, to support the uterus, or remedy a malposition.
(b)
A medicinal substance in the form of a bolus or mass, designed for introduction into the vagina; a vaginal suppository.
© Webster 1913.