Xu Collection, Lower Volume Radical: Page (yè) Kangxi Strokes: 25 Page 1410, Entry 45 Pronounced lu. According to the Erya (guangya), the cranium is called a skull. It is also commonly written as lu. In the History of the Former Han (Qianhan shu), Biography of the Five Sons of Emperor Wu, it is stated that heads were connected one after another on the road. In the Collected Rhymes (Jiyun), it is sometimes written as a variant form. According to the Six Books of Origin (Liushu gu), it is written as a variant form. Research Note: The Erya (guangya) states that the head and cranium are called a skull. In accordance with the original text, the term head and cranium has been corrected to cranium.