Zi Collection, Page Position: Upper, Radical: Water (shuǐ), Page 135, Entry 04
Means fine silk.
Also, in the "Guangyun," "Jiyun," and "Leipian," it is noted with the characters "mi" and "yao" for fanqie pronunciation, sounding the same as "suo." The "Jiyun" states: A finely meshed net is called 㠺.