最終更新日：2025/11/21
(biochemistry, pharmacology) A pale yellow crystalline naphthoquinone C₄₁H₅₆O₂ that is obtained especially from putrefied fish meal and produced by bacteria in the large intestine and essential for the blood-clotting process. It is much more unsaturated than vitamin K₁ and slightly less active biologically, and is an isoprenoid derivative of menadione.
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menaquinone
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元となった辞書の項目
menaquinone
IPA（発音記号）
名詞
(biochemistry,
pharmacology)
A
pale
yellow
crystalline
naphthoquinone
C₄₁H₅₆O₂
that
is
obtained
especially
from
putrefied
fish
meal
and
produced
by
bacteria
in
the
large
intestine
and
essential
for
the
blood-clotting
process.
It
is
much
more
unsaturated
than
vitamin
K₁
and
slightly
less
active
biologically,
and
is
an
isoprenoid
derivative
of
menadione.
日本語の意味
メナキノン：生化学および薬理学で用いられる名詞で、淡黄色の結晶性ナフキノン（分子式 C₄₁H₅₆O₂）を指す。特に腐敗した魚粉から得られ、大腸内の細菌が生成し、血液凝固に必要な物質である。ビタミンK₁よりも不飽和が多く、作用はやや劣る。また、メナジオンの異性化体（イソプレノイド誘導体）である。
意味（1）
(biochemistry,
pharmacology)
A
pale
yellow
crystalline
naphthoquinone
C₄₁H₅₆O₂
that
is
obtained
especially
from
putrefied
fish
meal
and
produced
by
bacteria
in
the
large
intestine
and
essential
for
the
blood-clotting
process.
It
is
much
more
unsaturated
than
vitamin
K₁
and
slightly
less
active
biologically,
and
is
an
isoprenoid
derivative
of
menadione.
（ plural ）
