borescope

[ bawr-skohp, bohr- ]
/ ˈbɔrˌskoʊp, ˈboʊr- /

noun Optics.

an instrument using optical fibers for the visual inspection of narrow cavities, as the bore of a gun.

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Origin of borescope

First recorded in 1955–60; bore2 + -scope
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020