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theodolitemore about theodolite

theodolite

 

  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Theodolite  \The*od"o*lite\,  n.  [Probably  a  corruption  of  the 
  alidade.  See  {Alidade}.] 
  An  instrument  used  especially  in  trigonometrical  surveying, 
  for  the  accurate  measurement  of  horizontal  angles,  and  also 
  usually  of  vertical  angles.  It  is  variously  constructed. 
 
  Note:  The  theodolite  consists  principally  of  a  telescope, 
  with  cross  wires  in  the  focus  of  its  object  glass, 
  clamped  in  Y's  attached  to  a  frame  that  is  mounted  so 
  as  to  turn  both  on  vertical  and  horizontal  axes,  the 
  former  carrying  a  vernier  plate  on  a  horizontal 
  graduated  plate  or  circle  for  azimuthal  angles,  and  the 
  latter  a  vertical  graduated  arc  or  semicircle  for 
  altitudes.  The  whole  is  furnished  with  levels  and 
  adjusting  screws  and  mounted  on  a  tripod. 
 
  From  WordNet  r  1.6  [wn]: 
 
  theodolite 
  n  :  an  instrument  for  measuring  horizontal  and  vertical  angles, 
  consisting  of  a  small  tripod-mounted  telescope  [syn:  {transit}]




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