1. a contraceptive device consisting of a small thimble-shaped cup that is placed over the uterine cervix to prevent the entrance of spermatozoa;
WordNet (r) 3.0 (2006):
cervical cap
n 1: a contraceptive device consisting of a small thimble-shaped
cup that is placed over the uterine cervix to prevent the
entrance of spermatozoa