元となった辞書の項目
motograph
noun
(historical)
A
device
used
in
the
making
of
a
loud-speaking
telephone,
depending
on
the
fact
that
the
friction
between
a
metallic
point
and
a
moving
cylinder
of
moistened
chalk,
or
a
moving
slip
of
paper,
on
which
it
rests
is
diminished
by
the
passage
of
a
current
between
the
point
and
the
moving
surface.
意味（1）
(historical)
A
device
used
in
the
making
of
a
loud-speaking
telephone,
depending
on
the
fact
that
the
friction
between
a
metallic
point
and
a
moving
cylinder
of
moistened
chalk,
or
a
moving
slip
of
paper,
on
which
it
rests
is
diminished
by
the
passage
of
a
current
between
the
point
and
the
moving
surface.
