mestranol

/ˈmɛstrəˌnɔl/
noun
  1. A synthetic form of estrogen used in some birth control pills and hormone therapies.
    • Mestranol is one of the hormones found in older types of oral contraceptives.
    • Some women experience side effects from mestranol, such as nausea or headaches.
    • The doctor explained that mestranol helps regulate the menstrual cycle.