Alternative forms 
Old English cristal (“clear ice/mineral”), from Latin crystallum (“crystal, ice”), later reinforced from Anglo-Norman cristall, Middle French cristal, from Latin crystallum, from Ancient Greek κρύσταλλος (krustallos, “clear ice”), from κρύος (kruos, “frost”), from the Proto-Indo-European *krus-, *kru- (“hard, hard outer surface, crust”).
crystal (countable and uncountable; plural crystals)
- (countable) 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.
- (countable) A piece of glimmering, shining mineral resembling ice or glass.
- (uncountable) A fine type of glassware, or the material used to make it.
- (uncountable, slang) crystal meth: methamphetamine hydrochloride.
Derived terms 
Related terms 
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Translations to be checked
- “crystal” in Douglas Harper, Online Etymology Dictionary (2001).