最終更新日：2024/08/01
(astronomy) An instrument for determining the time of apparent noon. It consists of two mirrors and a plane glass in the form of a prism, so that, by the reflections of the sun's rays from their surfaces, two images are presented to the eye, moving in opposite directions, and coinciding at the instant the sun's centre is on the meridian.
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dipleidoscope
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元となった辞書の項目
dipleidoscope
noun
(astronomy)
An
instrument
for
determining
the
time
of
apparent
noon.
It
consists
of
two
mirrors
and
a
plane
glass
in
the
form
of
a
prism,
so
that,
by
the
reflections
of
the
sun's
rays
from
their
surfaces,
two
images
are
presented
to
the
eye,
moving
in
opposite
directions,
and
coinciding
at
the
instant
the
sun's
centre
is
on
the
meridian.
意味（1）
(astronomy)
An
instrument
for
determining
the
time
of
apparent
noon.
It
consists
of
two
mirrors
and
a
plane
glass
in
the
form
of
a
prism,
so
that,
by
the
reflections
of
the
sun's
rays
from
their
surfaces,
two
images
are
presented
to
the
eye,
moving
in
opposite
directions,
and
coinciding
at
the
instant
the
sun's
centre
is
on
the
meridian.
