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oestriol

/ˈiːstrɪˌɒl; ˈɛstrɪ-/
noun
1.
a weak oestrogenic hormone secreted by the mammalian ovary: a synthetic form is used to treat oestrogen deficiency. Formula: C18H24O3
Word Origin
C20: from oestrin + tri- + -ol1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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8
9
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