Definition of oestradiol in English:


(US estradiol)


mass nounBiochemistry
  • A major oestrogen produced in the ovaries.

    • ‘Even though the ovaries cease producing estradiol, estriol continues to be made by the adrenal glands and in fat cells.’
    • ‘In malignancies of the breast, it is the oestrogen hormone, oestradiol that is the key.’
    • ‘Testosterone and estradiol follow this rule, but progesterone is an exception.’
    • ‘The primary estrogen secreted by the ovary is estradiol, whereas that of the placenta is estriol.’
    • ‘Steroid hormones such as progesterone, testosterone, and estradiol are derived from cholesterol, a major constituent of biomembranes.’
    • ‘Natural estrogen can also easily be divided into the three types of estrogen: estradiol, estrone, and estriol.’
    • ‘There were increases in blood levels of the estrogens, estradiol and estrone, and a reduction of the protective HDL cholesterol.’
    • ‘The prominent estrogens in women are estradiol, estrone and estriol.’
    • ‘Once ovulation takes place, a surge of growth in the luteal cells causes progesterone and some estradiol to be secreted.’


1930s: from oestrus + di- + -ol.