Si Collection, Lower Volume
Radical: Ox (niú)
牴; Kangxi Strokes: 9; Page 700, Entry 05
Pronounced di (rising tone).
Shuowen Jiezi (Explaining Graphs and Analyzing Characters): To butt. Formed by the radical for ox and the phonetic element di.
Tangyun (Tang Dynasty Rhyme Dictionary): Horn butting.
Yangzi Fangyan (Regional Speech): Di means to meet. In the regions of Yong and Liang, it is called di; in the regions of Qin and Jin, it is also called di.
Yupian (Jade Chapters): Horn-butting, a type of variety performance.
Yupian: To summarize. Great di, meaning a general summary.
Yupian: Sometimes written in a variant form as di or di or di.
Also, according to Jiyun (Collected Rhymes), pronounced di (rising tone). Originally written as a character for a ram.
Also, according to Jiyun, pronounced jie. Di, the name of a beast with an honest and upright nature.