lustrous vs nacreous

lustrous

adj
  • As if shining with a brilliant light; radiant. 

  • Having a glow or lustre. 

nacreous

adj
  • Exhibiting lustrous or rainbow-like colors. 

  • Of, or resembling nacre (mother of pearl). 

How often have the words lustrous and nacreous occurred in a corpus of books? (source: Google Ngram Viewer )