Last Updated：2025/12/06
Diameter of the bore of a firearm, typically measured between opposite lands. / The diameter of round or cylindrical body, as of a bullet, a projectile, or a column.
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caliber
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Source Word
caliber
IPA(Pronunciation)
Noun
Australia
Canada
New-Zealand
UK
countable
uncountable
figuratively
dated
Japanese Meaning
口径：銃身やパイプの内径、または弾丸や射出物の円形または円筒形の体の直径 / 例：銃や弾丸の口径として用いられる。また、柱やその他円形の断面を持つ物体の直径を表す
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Unit
of
measure
used
to
express
the
length
of
the
bore
of
a
weapon.
The
number
of
calibres
is
determined
by
dividing
the
length
of
the
bore
of
the
weapon,
from
the
breech
face
of
the
tube
to
the
muzzle,
by
the
diameter
of
its
bore.
A
gun
tube
the
bore
of
which
is
40
feet
(480
inches)
long
and
12
inches
in
diameter
is
said
to
be
40
calibers
long.
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（ plural ）
