oestriol oestrin • oestrogen · · · Info · Definitions · Synonyms · Characters · · oestriol · · Text Latin · · Script 8 · · Length 3 · · Syllables Definitions · · · (noun) a naturally occurring estrogenic hormone; a synthetic form is used to treat estrogen deficiency. Synonyms: estriol. · · Noun Definition 1 Synonyms · · · estriol · · Synonym 1 Characters · · e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074