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English Dictionary

plumb line



  1. a string with a metal weight at one end that, when suspended, points directly towards the earth's centre of gravity and so is used to determine verticality, the depth of water, etc
  2. another name for plumb rule

Example Sentences Including 'plumb line'

From the rim where they stood, cliffs of the usual dark grey stone fell straight as a plumb line down to the
Kerr, Katharine A Time of War


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