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dialytic telescope
noun
An
achromatic
telescope
in
which
the
coloured
dispersion
produced
by
a
single
object
lens
of
crown
glass
is
corrected
by
a
smaller
concave
lens,
or
combination
of
lenses,
of
high
dispersive
power,
placed
at
a
distance
in
the
narrower
part
of
the
converging
cone
of
rays,
usually
near
the
middle
of
the
tube.
telescopic sight
noun
solar telescope
reflecting telescope
noun
refracting telescope
noun
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