1. crystal clear transmitting light; able to be seen through with clarity
  2. crystal counter a counter tube in which an ionizing event increases conductivity
  3. crystal oscillator an oscillator that produces electrical oscillations at a frequency determined by the physical characteristics of a piezoelectric quartz crystal
  4. crystal violet a green crystal (violet in water) used as a dye or stain or bactericide or fungicide or anthelmintic or burn treatment
  5. crystallographer a specialist in crystallography
  6. crustal plate a rigid layer of the Earth's crust that is believed to drift slowly
  7. crystal ball a glass or crystal globe used in crystal gazing by fortunetellers
  8. crystallography the branch of science that studies the formation and structure of crystals
  9. nostalgia a longing for something past
  10. crystal tea evergreen shrub of eastern North America having white or creamy bell-shaped flowers and dark green hairy leaves used for tea during American Revolution
  11. crystalline consisting of or containing or of the nature of crystals
  12. crystal detector a detector consisting of a fine wire in contact with a galena crystal; acts as a rectifier
  13. Cristobal Colon Italian navigator who discovered the New World in the service of Spain while looking for a route to China (1451-1506)
  14. crystallized having both internal structure and external form of a crystal
  15. crystallize cause to form crystals or assume crystalline form
  16. crystallised having become fixed and definite in form
  17. crystalized preserved by coating with or allowing to absorb sugar
  18. crystallise cause to form crystals or assume crystalline form
  19. crystalize cause to form crystals or assume crystalline form
  20. crystalline lens biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focuses light on the retina