n. 子宫帽；子宫托；阴道栓（pessary的复数）

Pessary \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.