缫（繅）zǎo

[书] ❶ （古代帝王帽上系玉的彩色丝绳） colourful silk string on the crown of the king or emperor, which is used to thread with pieces of jade
❷ （圭等玉器的垫子） cushion or mat for a tablet of jade or a jade article
另见 see also sāo。