Last Updated：2025/11/21
(physics, meteorology) A principal high-level cloud type appearing as a thin, white patch of cloud without shadows, composed of very small droplets in the form of grains or ripples. The elements may be merged or separate, and more or less regularly arranged; they subtend an angle of less than 1° when observed at an angle of more than 30° above the horizon. Holes or rifts often occur in a sheet of cirrocumulus. Abbreviated Cc.
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cirrocumulus
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Source Word
cirrocumulus
Noun
(physics,
meteorology)
A
principal
high-level
cloud
type
appearing
as
a
thin,
white
patch
of
cloud
without
shadows,
composed
of
very
small
droplets
in
the
form
of
grains
or
ripples.
The
elements
may
be
merged
or
separate,
and
more
or
less
regularly
arranged;
they
subtend
an
angle
of
less
than
1°
when
observed
at
an
angle
of
more
than
30°
above
the
horizon.
Holes
or
rifts
often
occur
in
a
sheet
of
cirrocumulus.
Abbreviated
Cc.
Japanese Meaning
極高層に形成される薄く白い雲で、非常に小さな水滴が粒状または波状に集まっている雲。 / 雲の構成要素は合体または分離しており、規則的なパターンを呈することがある。 / 観測時は水平線より30度以上高い位置から見ると、視角1度未満の小さな要素として現れる雲。 / しばしば雲のシート状部分に隙間や亀裂（holeやrift）が見られる。
Sense（1）
(physics,
meteorology)
A
principal
high-level
cloud
type
appearing
as
a
thin,
white
patch
of
cloud
without
shadows,
composed
of
very
small
droplets
in
the
form
of
grains
or
ripples.
The
elements
may
be
merged
or
separate,
and
more
or
less
regularly
arranged;
they
subtend
an
angle
of
less
than
1°
when
observed
at
an
angle
of
more
than
30°
above
the
horizon.
Holes
or
rifts
often
occur
in
a
sheet
of
cirrocumulus.
Abbreviated
Cc.
（ plural ）
