Definition of Crystal

Noun: crystal kris-t(u)l

A solid formed by the solidification of a chemical and having a highly regular atomic structure
A crystalline element used as a component in various electronic devices
A rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces
- crystallization
Colourless glass made of almost pure silica
- quartz glass, quartz, vitreous silica, lechatelierite
Glassware made of quartz
A protective cover that protects the face of a watch
- watch crystal, watch glass