You Collection, Upper Volume Radical: Horn (jiǎo) Qiu Page 1140, Entry 03 Tang Rhymes (Tangyun) and Collected Rhymes (Jiyun) state it is pronounced qiu. Explanation from Explaining Graphs and Analyzing Characters (Shuowen Jiezi): The appearance of a horn. Book of Odes (Shijing), Lesser Odes of the Kingdom: The rhinoceros horn is curved. Modern editions use the variant character qiu, which is interchangeable with qiu. Zhu Xi Commentary (Zhu Zhuan): The appearance of a horn curved upwards. Guliang Commentary (Guliang Zhuan), Seventh Year of Duke Cheng: On the day of the suburban sacrifice, the ox had its horns inspected and it was noted that they were injured. Commentary: This refers to the appearance of curved, rounded horns. Collected Rhymes (Jiyun): Also pronounced qiu. Jade Chapters (Yupian): Pronounced jiu. The meaning is the same. Collected Rhymes (Jiyun): Pronounced jiu (rising tone). It also describes the appearance of a horn. It cites the Guliang Commentary regarding the inspection of curved horns.