oestriol

 
Pronunciation: /ˈiːstrɪɒl, ˈɛstrɪɒl/
(US estriol)

noun

[mass noun] Biochemistry
  • an oestrogen which is one of the metabolic products of oestradiol.

Origin:

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