plumb rule

noun

A narrow board with a plumb line fastened to the top, used to determine a perpendicular.

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Meanings

nounplumb rule (plural plumb rules)

plural plumb rules

  1. A narrow board with a plumb line fastened to the top, used to determine a perpendicular.
Cite this entry
APA

plumb rule. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/plumb%20rule

MLA

“plumb rule.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/plumb%20rule. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “plumb rule,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/plumb%20rule.

Source: plumb rule on Wiktionary, CC BY-SA 4.0.