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View synonyms for plumb rule

plumb rule

noun

  1. a device for determining perpendicularity, consisting of a narrow board with a plumb line and bob suspended from an upper edge.

plumb rule

noun

  1. a plumb line attached to a narrow board, used by builders, surveyors, etc

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Word History and Origins

Origin of plumb rule1

1350–1400; Middle English plomreule

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petrichor

[pet-ri-kawr]

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