crystalline in WordNet English dictionary

1. transmitting light; able to be seen through with clarity
   "the cold crystalline water of melted snow"; "crystal clear skies"; "could see the sand on the bottom of the limpid pool"; "lucid air"; "a pellucid brook"; "transparent crystal"
   crystalline  crystal clear  limpid  lucid  pellucid  transparent 
   
2. consisting of or containing or of the nature of crystals
   "granite is crystalline"
   crystalline 
   
3. distinctly or sharply outlined
   "crystalline sharpness of outline"- John Buchan
   crystalline