crystal /ˈkristｌ/ I. n. 1.［u］水晶; ［c］水晶制品: clear as crystal 像水晶一般清楚；crystals hung around the lights 挂在灯周围的水晶制品；a crystal ball 一个水晶球 2.［c］结晶；晶体: Salt and sugar occur as crystals. 盐和糖呈现晶体。‖II. adj. 水晶般清澈的：a crystal stream 清澈见底的小河