Wu Collection, Lower Volume Radical: Stone (shí) Character: Cǎ Kangxi stroke count: 20 Page 838, Entry 07 According to the Extensive Rhymes (Guangyun) and the Collected Rhymes (Jiyun), the pronunciation is ca. According to the Jade Chapters (Yupian), it refers to rough stone. Also, according to the Collected Rhymes (Jiyun), it is pronounced zǎn, and the meaning is the same. It is also used interchangeably with ca, meaning to grind or rub.