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Jacob's staff

American  

noun

  • Jacob's staves
    plural
  1. Astronomy. cross-staff.

  2. Surveying. a pole providing a firm support for a compass or other instrument.


Jacob's staff British  

noun

  1. a medieval instrument for measuring heights and distances

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms


Etymology

Origin of Jacob's staff

First recorded in 1540–50


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

By Jacob's staff, I swear I have no mind of feasting forth to-night; But I will go.

From The Merchant of Venice by William Shakespeare

The bear again disappeared, taking the Jacob's staff, and appeared no more that night.

From Bears I Have Met—and Others by Allen Kelly

A third instrument, also to measure the height of a celestial body, was called the Jacob's staff.

From The Age of the Reformation by Preserved Smith

Jacob's staff I swear, I have no mind of feasting forth to-night: But I will go.—Go you before me, sirrah; Say, I will come.

From Shakespeare's play of the Merchant of Venice Arranged for Representation at the Princess's Theatre, with Historical and Explanatory Notes by Charles Kean, F.S.A. by Charles John Kean

It seems you would be a fine capricious, mathematically jealous coxcomb; take the height of your own horns with a Jacob's staff, afore they are up.

From The White Devil by John Webster

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