Circumferentor

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Circumferentor \Cir*cum`fer*en"tor\, n. [See {Circumfer}.]
     [1913 Webster]
     1. A surveying instrument, for taking horizontal angles and
        bearings; a surveyor's compass. It consists of a compass
        whose needle plays over a circle graduated to 360[deg],
        and of a horizontal brass bar at the ends of which are


        standards with narrow slits for sighting, supported on a
        tripod by a ball and socket joint.
        [1913 Webster]
  
     2. A graduated wheel for measuring tires; a tire circle.
        [1913 Webster]