cervical cap

The cervical cap is a cervical barrier type of birth control. It fits snugly over the cervix, the entrace of the uterus, and blocks sperm from entering the female reproductive tract. Cervical caps may be made out of latex or silicone.
See more at Wikipedia.org...

Cervical cap n. A small, rubber, cup-shaped contraceptive device that fits over the uterine cervix to prevent the entry of sperm. [more]Cervical cap - Community and Resources

Noun
1. a contraceptive device consisting of a small thimble-shaped cup that is placed over the uterine cervix to prevent the entrance of spermatozoa
(hypernym) contraceptive, preventive, preventative, contraceptive device, prophylactic device, birth control device