a.

1. 结晶的；结晶质的，结晶状的
   crystalline rocks

   水晶岩石

2. 水晶制的
3. 水晶般的；透明的；清晰的
   a crystalline mountain stream

   清澈的山间小溪

   Before she died, she bequeathed her crystalline necklace to her daughter.

   在她死前，她把水晶般透明的项链留给女儿。

adj.

1. having the structure and form of a crystal.
2. literary very clear.