crystal
/ˈkrɪstl; `krɪstl/ n
1
(a) [U] transparent colourless mineral, such as quartz 无色透明的矿物（如石英）; 水晶.
(b) [C] piece of this, esp when used as an ornament 水晶石; （尤指）水晶饰品
a necklace of crystals 水晶珠项链
[attrib 作定语]
a crystal bracelet, watch, etc 水晶镯子、 石英表.
2 [U] high-quality glassware, made into bowls, vases, glasses, etc 晶质玻璃制品（如碗、 瓶、 杯等）
The dining-table shone with silver and crystal. 餐桌上摆的银制餐具和晶质玻璃器皿闪闪发光.
[attrib 作定语]
a crystal vase, chandelier, etc 晶质玻璃花瓶、 吊灯等.
3 [C] (chemistry 化) regular many-sided shape which the molecules of a substance form when it is solid 结晶（体）
sugar and salt crystals 糖和盐的结晶体
snow and ice crystals 雪和冰的结晶体.
4 [C] (US) glass or plastic cover of the face of a watch 表蒙子.