cross-staff

[ kraws-staf, -stahf, kros- ]

/ ˈkrɔsˌstæf, -ˌstɑf, ˈkrɒs- /

noun, plural cross-staffs, cross-staves.Astronomy.

an instrument for measuring the angle of elevation of heavenly bodies, consisting of a calibrated staff with another shorter staff perpendicular to and sliding on it.

Also called forestaff, Jacob's staff.

Origin of cross-staff

1400–50, for an earlier sense; late Middle English

Words nearby cross-staff

cross-sectional study, cross-sell, cross-slide, cross someone's palm with silver, cross someone's path, cross-staff, cross-sterile, cross-stitch, cross-stratification, cross street, cross-string

Example sentences from the Web for cross-staff

The cross-staff had not then come into use, and it was never of much service in low latitudes.
Christopher Columbus and His Monument Columbia|Various
Even the navigators of the fifteenth century were aware of the deficiencies of the cross-staff and sought to improve upon it.
Every-day Science: Volume VII. The Conquest of Time and Space|Henry Smith Williams
The simplest and crudest form of measurer of which the record has been preserved is known as the cross-staff.
Every-day Science: Volume VII. The Conquest of Time and Space|Henry Smith Williams
Iacobs staffean instrument formerly used for measuring the altitude of the sun; a cross-staff.
The Fatal Dowry|Philip Massinger

The vane of a cross-staff, made to slide along it by means of a square socket; it may be set to any of the graduations.
The Sailor's Word-Book|William Henry Smyth

单词	cross-staff
释义	cross-staff [ kraws-staf, -stahf, kros- ] / ˈkrɔsˌstæf, -ˌstɑf, ˈkrɒs- / noun, plural cross-staffs, cross-staves.Astronomy. an instrument for measuring the angle of elevation of heavenly bodies, consisting of a calibrated staff with another shorter staff perpendicular to and sliding on it. Also called forestaff, Jacob's staff. Origin of cross-staff 1400–50, for an earlier sense; late Middle English Words nearby cross-staff cross-sectional study, cross-sell, cross-slide, cross someone's palm with silver, cross someone's path, cross-staff, cross-sterile, cross-stitch, cross-stratification, cross street, cross-string Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for cross-staff The cross-staff had not then come into use, and it was never of much service in low latitudes. Christopher Columbus and His Monument Columbia\|Various Even the navigators of the fifteenth century were aware of the deficiencies of the cross-staff and sought to improve upon it. Every-day Science: Volume VII. The Conquest of Time and Space\|Henry Smith Williams The simplest and crudest form of measurer of which the record has been preserved is known as the cross-staff. Every-day Science: Volume VII. The Conquest of Time and Space\|Henry Smith Williams Iacobs staffean instrument formerly used for measuring the altitude of the sun; a cross-staff. The Fatal Dowry\|Philip Massinger The vane of a cross-staff, made to slide along it by means of a square socket; it may be set to any of the graduations. The Sailor's Word-Book\|William Henry Smyth
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