oral contraceptive Definition

any of various preparations (as of norethindrone and ethinyl estradiol) that are taken orally especially on a daily basis and act as contraceptives : birth control pill

any of various preparations that usually contain both a progestin (such as norethindrone) and an estrogen (such as ethinyl estradiol), are taken orally especially on a daily basis, and act as contraceptives typically preventing ovulation by suppressing secretion of gonadotropins (such as luteinizing hormone) —called also oral contraceptive