argent vs lustrous

argent

adj
  • Of silver or silver-coloured. 

  • of white or silver tincture on a coat of arms. 

noun
  • The white or silver tincture on a coat of arms. 

  • A moth of the genus Argyresthia. 

lustrous

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

  • Having a glow or lustre. 

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