Yin Collection, Lower Volume
Radical: Snout (jì)
Character: huo
Kangxi Strokes: 26
Page 362, Entry 33
According to the Extensive Rhymes (Guangyun), it is pronounced huo (falling-rising tone); according to the Rhyme Compilation (Yunhui), it is pronounced huo (falling-rising tone), with the sound of huo (falling tone).
According to the Explaining Graphs and Analyzing Characters (Shuowen), it was originally written as huo. Huo means to measure. It may also be written with the radical for find (xun), as find also implies to measure.
From the Rhapsody on the Long Flute (Changdi Fu) by Ma Rong: To trim the beginning and the end, following the rules of the square and the compass.
Also, according to the Extensive Rhymes (Guangyun) and the Rhyme Compilation (Yunhui), it is pronounced huo (entering tone). Also, according to the Extensive Rhymes (Guangyun), it is pronounced huo (entering tone). The meaning is the same.