An
Altocumulus
is
a
cloud
belonging
to
a
class
characterized
by
globular
masses
or
rolls
in
layers
or
patches,
the
individual
elements
being
larger
and
darker
than
those
of
cirrocumulus
and
smaller
than
those
of
stratocumulus.
These
clouds
are
of
medium
altitude,
about
8000-20,000
ft
(2400-6100
m).
A
middle
cloud,
usually
white
or
gray,
often
occurs
in
layers
or
patches
with
wavy,
rounded
masses
or
rolls.