Xu Collection, Upper Volume
Radical: Metal (jīn)
Character: Yu
Kangxi Stroke Count: 17
Page 1314, Entry 11
According to the Extensive Rhyme (Guangyun), the Collected Rhymes (Jiyun), and the Rhyme Compilation (Yunhui), the pronunciation is yu (rising tone), identical to the sound of yu.
According to the Jade Chapters (Yupian), it refers to a saw.
Furthermore, according to the Collected Rhymes (Jiyun), it refers to a ju-yu, which is an ornament worn through the ear.
In the Discussion on the Capitals (Lun du fu) by Du Du, it mentions, "The lords with hair bound in tufts, garments overlapping to the left, and wearing ju-yu ornaments."
According to the Pi Cang dictionary, it refers to an ornament of gold, jade, or pearls suspended from pierced earlobes.