Yin Collection, Middle Volume
Radical: Mountain (shān)
Entry: 嶸
Kangxi stroke count: 17
Page 321, Entry 02
According to Tang Rhymes (Tangyun), Collected Rhymes (Jiyun), and Collection of Rhymes (Yunhui), the pronunciation is heng. According to Correct Rhymes (Zhengyun), the pronunciation is hu meng, phonetically rendered as heng.
In the Explanation of Simple and Compound Characters (Shuowen), it is defined as zheng rong, which refers to the appearance of a mountain that is high and precipitous. In the Western Capital Rhapsody (Xidu Fu) by Ban Gu, it is written that metal and stone are zheng rong. The commentary states that zheng rong refers to the appearance of being high, towering, and steep. In the Rhapsody on the Lingguang Palace of Lu (Lu Lingguangdian Fu) by Wang Yanshou, it is written as appearing vast and zheng rong.
Also, according to Broad Rhymes (Guangyun), it is pronounced yong bing, and according to Collected Rhymes (Jiyun), it is pronounced yu ping, sounding like rong. The meaning is the same. Collected Rhymes (Jiyun) notes that it is sometimes written in a variant form (ying), or also written as (rong).