Hai Collection, Upper Volume Radical: Bone (gǔ) Lou Kangxi strokes: 21 Page 1450, Entry 18 Guangyun (Rhyme Dictionary of the Wide Scheme): Pronounced lou Jiyun (Collective Rhymes) and Yunhui (Collection of Rhymes): Pronounced lou According to the Shuowen Jiezi (Explanation of Writing and Analysis of Characters), it means skull. According to the Guangya (Expanded Elegance), the cranium is called a skull. Zhuangzi, Chapter on Perfect Happiness (Zhuangzi): Zhuangzi went to the state of Chu and saw an empty skull. Jiyun: Sometimes written in a variant form.