forestaff

1 definition found

forestaff - Collaborative International Dictionary of English v.0.48 :

  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     of heavenly bodies, now superseded by the sextant; -- called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]