plumb bob


Definition of plumb bob

: the metal bob of a plumb line

Examples of plumb bob in a Sentence

Recent Examples on the Web For holes deeper than three feet, drop a plumb bob (a conical weight attached to a string) into it to give you some sense whether the hole itself is plumb and uniformly shaped. Ryan D'agostino, Popular Mechanics, 24 Oct. 2020 For a long time, the tools used to measure medieval buildings were nearly as old as the buildings themselves: plumb bobs, string, rulers, and pencils. Andrew Tallon, National Geographic, 16 Apr. 2019 The plumb bob will hang at the angle reading for your latitude. Rhett Allain, WIRED, 3 May 2018 Accurate to within 1/4 of an inch per 100 feet of range, the kit comes with a tripod with quick-adjust legs, a heavy-duty 8-foot aluminum grade rod (feet-inches-eighths), a plumb bob, and a kit box to safeguard the laser during transport. David Grossman, Popular Mechanics, 17 Jan. 2018 Cake pans, coffee pots, cash registers, and a white ElectroChef stove appeared amid scientific instruments such as steel calipers and a brass plumb bob. Jason Farago, New York Times, 7 Sep. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'plumb bob.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of plumb bob

1836, in the meaning defined above

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Time Traveler for plumb bob

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The first known use of plumb bob was in 1836

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Dictionary Entries Near plumb bob


plumb bob

plumb bond

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Cite this Entry

“Plumb bob.” Dictionary, Merriam-Webster, Accessed 18 Oct. 2021.

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More Definitions for plumb bob

plumb bob


English Language Learners Definition of plumb bob

: a usually small, heavy object that is used to make a string or rope hang straight : the heavy object that is part of a plumb line


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