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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 Shakespeare, William

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 Webster, John

The instrument is mounted on a tripod or Jacob's staff by means of a socket on the underside.

From Early American Scientific Instruments and Their Makers by Bedini, Silvio A.

His life is upright, for he is always looking upward, yet dares believe nothing above primum mobile, for 'tis out of the reach of his Jacob's staff.

From Character Writings of the 17th Century by Various

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 Kean, Charles John

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