#plumb_line__plumbline__perpendicular  a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point
  supertype:  cord  a line made of twisted fibers or threads; "the bundle was tied with a cord"
  subtype:  lead_line  plumb_rule
  part:  plumb_bob__plumbbob__plumb__plummet  the metal bob of a plumb line

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