contraceptive pill
noun
plural contraceptive pills
: any of various preparations that typically contain a progestin either alone or in combination with an estrogen, are taken orally especially on a daily basis, and act as contraceptives (see contraceptive entry 1) by preventing ovulation, thickening cervical mucus, or thinning uterine lining : birth control pill
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Merriam-Webster unabridged
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