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English
Noun
An early
navigational
instrument
, consisting of a wooden rod with a sliding crosspiece, used for measuring the
altitude
of a
star
; it developed into the
sextant
ru:cross-staff
vi:cross-staff
zh:cross-staff
GNU Project's publication of CIDE, the Collaborative International Dictionary of English
Forestaff \Fore"staff`\, n. (Naut.)
An instrument formerly used at sea for taking the altitudes
of heavenly bodies, now superseded by the sextant; -- called
also
cross-staff
. --Brande & C.
[1913 Webster]
GNU Project's publication of CIDE, the Collaborative International Dictionary of English
Cross-staff \Cross"-staff`\ (-st?f`), n.
1. An instrument formerly used at sea for taking the
altitudes of celestial bodies.
[1913 Webster]
2. A surveyor's instrument for measuring offsets.
[1913 Webster]
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