noun. The operation of finding, by means of a mine dial, the place where to sink an air shaft, or to bring an adit to the work, or to find which way the lode inclines.

verb. Present participle of plum.

noun. The operation of finding, by means of a mine dial (compass), the place where to sink an air shaft, or to bring an adit to the work, or to find which way the lode inclines.

"Using this method could drain your trap (the bendy part in your sink's plumming), causing some pretty creepy gasses to possibly ooze out of your sink."

plum