Hai Collection, Upper Volume Radical: Bone (gǔ) Character: Lou Kangxi strokes: 21 Page 1450, Entry 44 Pronounced lou. Shuowen Jiezi (Shuowen) states: A skull. Guangya states: The cranium is called a skull. Zhuangzi (Zhuangzi), chapter on Perfect Happiness: Zhuangzi traveled to Chu and saw an empty skull. Jiyun states: Also written in a variant form.