crystals

noun

1. 1

   A solid composed of an array of atoms or molecules possessing long-range order and arranged in a pattern which is periodic in three dimensions.

2. 2

   A piece of glimmering, shining mineral resembling ice or glass.

3. 3

   A fine type of glassware, or the material used to make it.

4. 4

   Crystal meth: methamphetamine hydrochloride.

5. 5

   The glass over the dial of a watch case.