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cryophorus
noun
(chemistry)
An
instrument
used
to
illustrate
the
freezing
of
water
by
its
own
evaporation.
The
ordinary
form
consists
of
two
glass
bulbs
connected
by
a
tube
and
containing
only
a
quantity
of
water
and
water
vapour,
devoid
of
air.
The
water
is
in
one
of
the
bulbs,
and
freezes
when
the
other
is
cooled
below
zero.