Endoscope (noun)

1. A medical instrument consisting of a long, thin tube with a light and a lens for viewing inside the body, used in procedures such as examining the inside of the bladder or stomach.
2. A similar instrument used for examining the interior of an object, such as an engine or a pipe.

Origin:

From the greek words "endos" meaning "within" and "skopein" meaning "to examine".

Examples:

1. The doctor used an endoscope to look inside the patient's throat.
2. The mechanic inserted an endoscope into the engine to diagnose the problem.
3. The endoscope allowed the surgeons to perform the operation through a small incision.
4. An endoscope was used to inspect the inside of the pipeline for corrosion.
5. The veterinarian used an endoscope to examine the cow's stomach.