A crystal ball

(Wicca) The ceremonial use of crystals for specific intentions and healing energies

plural of crystalline humour

A census-designated place in Washoe County, Nevada, United States.

Someone who claims to be able to see the future by gazing into a crystal ball. / (figuratively) Someone who makes predictions about the future, especially when these are seen as speculative.

The action or practice of gazing into a crystal ball in the hope or belief of seeing the future.

A periodic nanostructure that exhibit periodicity in its structure that results in bandgaps where energy cannot propagate, as well as negative refraction that can be exploited for wave focusing.

(medicine) An ammonium urate crystal having a rounded form with many projecting points.

Of or relating to crystallites.

a crystal which exhibits a spontaneous electric dipole moment