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range finder

or rangefinder

any of various instruments for determining the distance from the observer to a particular object, as for sighting a gun or adjusting the focus of a camera.
Origin of range finder
First recorded in 1870-75 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for rangefinder
Historical Examples
  • "Target—range one eight zero four, azimuth two four oh, elevation one oh seven," the rangefinder reported.

    A Question of Courage Jesse Franklin Bone
  • "Action imminent," Chase ordered, and the rangefinder took up his chant.

    A Question of Courage Jesse Franklin Bone
British Dictionary definitions for rangefinder


an instrument for determining the distance of an object from the observer, esp in order to sight a gun or focus a camera
another word for tacheometer
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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