What does endoscopy mean?
Endoscopy is a medical procedure that allows physicians to look directly inside the body without major surgery. A doctor inserts an endoscope — a slender, usually flexible tube fitted with a light source and a camera — through a natural opening or a small incision, transmitting live images of organs and cavities to a monitor. The technique most often examines the digestive tract, airways, joints, or urinary system, and it serves both diagnostic purposes, such as detecting ulcers, inflammation, or tumors, and therapeutic ones, including removing polyps or taking tissue biopsies. Beyond medicine, the term occasionally describes similar visual inspection of machinery or other enclosed spaces. Derived from Greek roots meaning "looking inside," the word entered English in the nineteenth century alongside the instruments it names. Endoscopy carries no strong connotations outside its clinical context; it is a neutral, technical noun, familiar chiefly from hospital settings and health discussions, where phrases like "undergo an endoscopy" are standard.
A medical procedure involving the visual examination of the interior of the body using an endoscope.
"Upper gastrointestinal endoscopy revealed a small ulcer near the stomach lining."
Usually treated as uncountable in general statements, but takes "an" when denoting a single procedure.
By extension, the inspection of the interior of any non-medical object or structure with a scope-like instrument.
"Endoscopy of the aircraft engine confirmed a hairline crack in one compressor blade."
The plural refers to multiple instances of the procedure, not to multiple instruments; the instrument itself is called an "endoscope."
"She has undergone three endoscopies over the past two years to monitor her condition."
Doctors can now swallow a camera the size of a vitamin pill to perform a full endoscopy of your small intestine — no sedation required.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of endoscopy
The word "endoscopy" derives from Greek: "endo-" meaning "within" or "inside," combined with "-scopy," from "skopein," meaning "to look" or "to examine." It was formed in the nineteenth century, following the development of the first practical endoscopes by pioneers such as Philipp Bozzini and later Adolf Kussmaul. The same Greek root "skopein" gives English a family of related terms including microscope, telescope, and stethoscope.
Related word forms
How endoscopy is actually used
"Endoscopy" is a formal, clinical term belonging primarily to medical register; laypeople typically encounter it when discussing diagnostic tests. It functions as an uncountable noun when referring to the procedure in general ("endoscopy is performed...") but takes an indefinite article when referring to a specific instance ("an endoscopy").
Easily confused with endoscopy
Colonoscopy is one specific type of endoscopy limited to examining the large intestine, whereas endoscopy is the general term for viewing internal organs with an endoscope.
Endoscopy is a diagnostic or surgical viewing procedure, while endotracheal intubation is the insertion of a tube into the windpipe to maintain an airway.