Last Updated：2025/11/22
(American spelling, biochemistry, pharmacology) A natural estrogenic hormone that is a phenolic alcohol estra-1,3,5-triene-3,17-diol (C₁₈H₂₄O₂) secreted chiefly by the ovaries of all vertebrates, that is a major and the most potent of the naturally occurring estrogens; the semisynthetic esterified compound is used medicinally to treat estrogen deficiency and breast cancer.
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estradiol
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Source Word
estradiol
IPA(Pronunciation)
Noun
US
countable
uncountable
(American
spelling,
biochemistry,
pharmacology)
A
natural
estrogenic
hormone
that
is
a
phenolic
alcohol
estra-1,3,5-triene-3,17-diol
(C₁₈H₂₄O₂)
secreted
chiefly
by
the
ovaries
of
all
vertebrates,
that
is
a
major
and
the
most
potent
of
the
naturally
occurring
estrogens;
the
semisynthetic
esterified
compound
is
used
medicinally
to
treat
estrogen
deficiency
and
breast
cancer.
Japanese Meaning
エストラジオール：自然に存在するエストロゲンホルモンの一種で、フェノール性アルコールであり、化学的にはエストラ‐1,3,5‐トリエン‐3,17‐ジオール（C₁₈H₂₄O₂）と表される。主に全脊椎動物の卵巣から分泌され、自然に存在するエストロゲンの中で最も強い作用を持つ。医療においては、エストロゲン欠乏症や乳がんの治療に半合成エステル化合物として用いられる場合がある。
Sense（1）
(American
spelling,
biochemistry,
pharmacology)
A
natural
estrogenic
hormone
that
is
a
phenolic
alcohol
estra-1,3,5-triene-3,17-diol
(C₁₈H₂₄O₂)
secreted
chiefly
by
the
ovaries
of
all
vertebrates,
that
is
a
major
and
the
most
potent
of
the
naturally
occurring
estrogens;
the
semisynthetic
esterified
compound
is
used
medicinally
to
treat
estrogen
deficiency
and
breast
cancer.
（ plural ）
