Topic: GLASS
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| Date: | 1000-1100 |
| Language: | Old French |
| Origin: | cristal, from Latin crystallum, from Greek krystallos 'ice, crystal' |
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crys‧tal
1 [uncountable]TIG very high quality clear glass : 
a set of six crystal glasses
a set of six crystal glasses2 [countable]HEG a small regular-shaped piece of a substance, formed naturally when this substance becomes solid : ice crystals copper sulphate crystals
ice crystalscopper sulphate crystals3 [uncountable and countable]HEG rock that is clear, or a piece of this
4 [countable] American EnglishTMC the clear cover on a clock or watch
