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backsight


backsight


  1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Backsight  \Back"sight`\,  n.  [Back,  adv  +  sight.  ]  (Surv.) 
  The  reading  of  the  leveling  staff  in  its  unchanged  position 
  when  the  leveling  instrument  has  been  taken  to  a  new 
  position;  a  sight  directed  backwards  to  a  station  previously 
  occupied.  Cf  {Foresight},  n.,  3.