Search Result for "mother-of-pearl cloud":
Wordnet 3.0

NOUN (1)

1. a luminous iridescent cloud at a high altitude that may be seen when the sun is a few degrees below the horizon;
[syn: nacreous cloud, mother-of-pearl cloud]



WordNet (r) 3.0 (2006):

mother-of-pearl cloud
    n 1: a luminous iridescent cloud at a high altitude that may be
         seen when the sun is a few degrees below the horizon [syn:
         nacreous cloud, mother-of-pearl cloud]