plumb rule

noun

Definition of plumb rule

: a narrow board with a plumb line and bob used especially by builders and carpenters

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History and Etymology for plumb rule

Middle English plomrewle, from plom, plum, plumbe, noun, plumb + rewle, reule rule

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Cite this Entry

“Plumb rule.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/plumb%20rule. Accessed 11 Aug. 2020.

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