Cir*cum`fer*en"tor (?), n. [See Circumfer.]


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°, 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.


A graduated wheel for measuring tires; a tire circle.


© Webster 1913.

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