Definitions

1. noun

a naturally occurring estrogen steroid hormone that is a major female sex hormone and is involved in the development and maintenance of the female reproductive system

“The research focused on the effects of oestradiol on the development of breast cancer in postmenopausal women.”

2. noun

a synthetic form of oestradiol used in hormone replacement therapy and birth control

“The doctor prescribed a low-dose oestradiol patch for the patient’s menopausal symptoms.”