pessary

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a contraceptive device consisting of a flexible dome-shaped cup made of rubber or plastic;
it is filled with spermicide and fitted over the uterine cervix
• Syn:
diaphragm, contraceptive diaphragm
• Hypernyms:
contraceptive, preventive, preventative, contraceptive device, prophylactic device, birth control device

• Từ đồng nghĩa / Synonyms:
  diaphragm, contraceptive diaphragm