stenometer

noun

ste·​nom·​e·​ter

stə̇ˈnämətə(r),

-mətə-

: an instrument for measuring distances consisting of a telescope mounted on a tripod and fitted with a micrometer screw so that the distance may be measured to a rod carrying two targets a known distance apart whose images are brought together in the telescope by the micrometer screw

Word History

Etymology

sten- + -meter

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