Standard Lemma guide
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
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No pronunciation record was provided for this word.
noun
A steroid hydrocarbon that is the basis of several female hormones
Definition source: English Wiktionary via Wiktextract
Usage: US
Topics: chemistry, natural-sciences, organic-chemistry, physical-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
Etymology tree Proto-Indo-European *h1eysh2-der. Ancient Greek οἶστρος (oîstros)der. Latin oestrusbor. English estrus Ancient Greek -ο- (-o-)der. Latin -o-bor. English -o- English estro- French -gènebor. English -gen English estr(ogen) Proto-Indo-European *-nós Proto-Italic *-nos Latin -nus Latin -ānusder. English -ane English estrane From estr(ogen) + -ane.
