range finder

noun

any of various instruments for determining the distance of a target or object from an observer, or from a gun, camera, etc.
also rangefinder

noun

See range finder in American Heritage Dictionary 4

also range·find·er

noun
Any of various optical, electronic, or acoustical instruments used to determine the distance of an object from the observer.

Related Forms:

  • rangeˈfindˌer adjective

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