nacreous | (adj) resembling nacre |
nacreous | (adj) consisting of or resembling mother-of-pearl |
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, Syn. mother-of-pearl cloud |
Nacreous | a. [ See Nacre. ] (Zool.) Consisting of, or resembling, nacre; pearly. [ 1913 Webster ] |