1. Consisting of or resembling mother-of-pearl 
2. Having a play of lustrous rainbow colours
   "nacreous clouds looking like mother-of-pearl"
   - iridescent, opalescent, opaline, pearlescent

See also: bright, nacre

• basely
• baseman
• basement
• baseness
• basenji
• baseplate
• bash
• basher
• bashful
• bashfully
• bashfulness
• basho
• Basia
• basic
• basic assumption
• basic cognitive process
• basic color
• coaling station
• coalition
• coalitionist
• coalman
• coalpit
• coaming
• coapt
• coaptation