元となった辞書の項目
bilge keel
noun
(nautical)
a
strake,
or
small
keel
or
blister,
running
along
much
of
the
length
of
the
hull.
It
is
used
to
reduce
the
hull's
tendency
to
roll.
They
are
typically
fitted
one
on
each
side,
low
down
on
the
side
of
the
hull,
so
as
not
to
increase
the
draft
of
the
vessel.
In
battleships
they
were
often
quite
large
and
used
as
part
of
the
torpedo
protection
system.
意味（1）
(nautical)
a
strake,
or
small
keel
or
blister,
running
along
much
of
the
length
of
the
hull.
It
is
used
to
reduce
the
hull's
tendency
to
roll.
They
are
typically
fitted
one
on
each
side,
low
down
on
the
side
of
the
hull,
so
as
not
to
increase
the
draft
of
the
vessel.
In
battleships
they
were
often
quite
large
and
used
as
part
of
the
torpedo
protection
system.
