nacreous cloud, n.
a luminous iridescent cloud at a high altitude that may be seen when the sun is a few degrees below the horizon
<noun.object>
mother-of-pearl cloud nacreous cloud
semantic pointers
hypernym
Word
a luminous iridescent cloud at a high altitude that may be seen when the sun is a few degrees below the horizon
<noun.object>
mother-of-pearl cloud nacreous cloud