Definition of borescope
: an optical device (such as a prism or optical fiber) used to inspect an inaccessible space (such as an engine cylinder)
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If that doesn’t work, drill a hole next to the lock, and insert your borescope to line up the notches by sight.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'borescope.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of borescope
1941
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