1. optical instruments with a long, flexible tube used to inspect the interior of pipes, engines, or other confined spaces
Usage: technical; plural form of borescope

Examples

• The mechanics used borescopes to examine the engine cylinders for damage.
• Borescopes allow technicians to see inside machinery without disassembly.
• The plumber inserted borescopes into the pipes to locate the blockage.
• Aircraft inspectors rely on borescopes to check turbine blades.
• Modern borescopes can record video of internal components.
• The quality control team used borescopes to inspect welds in tight spaces.