plumming

1. 1
   verb

   The -ing form of plum. Use it after am, is, are, was or were, or to name the action.

   Note
2. 2
   noununcountable

   Using a mining compass to find where to dig a shaft or tunnel, and which way the ore runs.

   Like using a compass to plan the best path before walking into a forest.

   The miners did some plumming before they started digging the new shaft.

   Good plumming told them which way to follow the ore.

   Similarsurveying

   Note
3. 3
   noununcountable

   A purple color fault that can spoil photo prints.

   Like a stain that slowly turns an old photo purple.

   The old photos showed a lot of plumming around the edges.

   Bad chemicals left plumming across the whole print.

   Note

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