Definition of oestriol in English:

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Pronunciation: /ˈiːstrɪɒl/
Pronunciation: /ˈɛstrɪɒl/
(US estriol)


[mass noun] Biochemistry
An oestrogen which is one of the metabolic products of oestradiol.
Example sentences
  • The prominent estrogens in women are estradiol, estrone and estriol.
  • Even though the ovaries cease producing estradiol, estriol continues to be made by the adrenal glands and in fat cells.
  • Fetal cortisol and estriol were measured in the umbilical vein plasma at delivery.


1930s: from oestrane (the parent molecule of most oestrogens) + tri- + -ol.

For editors and proofreaders

Line breaks: oes|triol

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