Free Dictionary

Free Dictionary

Home ×
Link Link Link Link

Search Result for "backstaff": 

The Collaborative International Dictionary of English v.0.48:

Backstaff \Back"staff`\, n. An instrument formerly used for taking the altitude of the heavenly bodies, but now superseded by the quadrant and sextant; -- so called because the observer turned his back to the body observed. [1913 Webster]