(physics) A specific vector associated with the movement of electrons in a crystal lattice

clear, colourless form of the silica-based mineral quartz, often called "pure quartz" or "clear quartz".

plural of crystal lattice

Alternative form of crystalline humour

(obsolete) The lens of the eye.

Obsolete form of crystal.

(optics) A uniaxial crystal, such as one of calcite, in which the extraordinary wave travels faster than the ordinary wave / A crystal that contains a cavity

Containing or producing crystals

(mineralogy) A mineral crystal whose interior space is empty

plural of crystal dick