crys·tal/`krɪstḷ; ˈkrɪstl/ n 1 [C,U] a type of rock that is transparent 水晶 2 [U] high quality glass 水晶玻璃: crystal wine glasses 水晶玻璃酒杯 3 [C] a regular shape that forms naturally when some MINERAL substances become solid 结晶（体）: crystals of ice 冰晶 salt crystals 盐结晶