Standard Lemma guide

estriol

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • General-American: /ˈɛˌstɹaɪˌɔl/
  • General-American: Recorded audio is listed in the source snapshot.

1

noun

Meaning 1

A relatively weak natural estrogenic hormone that is a glycol C18H24O3 found in the body chiefly as a metabolite of estradiol, is the main estrogen secreted by the placenta during pregnancy, and is the estrogen typically found in the urine of pregnant women.

Definition source: English Wiktionary via Wiktextract

Usage: US, countable, uncountable

Qualifier: steroids

Topics: biochemistry, biology, chemistry, medicine, microbiology, natural-sciences, pharmacology, physical-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: theelol

Antonyms: none provided

2

noun

Meaning 2

a naturally occurring estrogenic hormone; a synthetic form is used to treat estrogen deficiency

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: oestriol

Antonyms: none provided

Broader terms: estrogen, oestrogen

History

Etymology

Blend of estratriene + triol.