plumming

  1. Verb.  (present participle of, plum) .
  2. Noun.  (mining) 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.

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This entry was last updated on RefTopia from its source on 3/20/2012.