Xu Collection, Lower Volume Radical: Leaf (yè) Kangxi Strokes: 11 Page 1399, Entry 02 Tang Dynasty Rhymes (Tangyun), Collection of Rhymes (Jiyun), and Dictionary of Rhymes (Yunhui) state it is pronounced ding. Explanation from the Explaining Graphs and Analyzing Characters (Shuowen): The top of the head. Broad Rhymes (Guangyun): Ding refers to the top of the head. Master Yang's Dialects (Fangyan): Dian and ding mean the top. Book of Changes (Yijing): To cross deep water is to be submerged over one's head. The ancient seal script form is written as a variant. Sometimes also written in a variant form (ding).