The story
From esophago- + gastro- + duodenoscopy.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A medical procedure in which a endoscope is inserted through the mouth to visually examine the esophagus, stomach, and the duodenum, typically used to diagnose or sometimes treat conditions affecting the upper gastrointestinal tract. Full definition →
From esophago- + gastro- + duodenoscopy.
Etymology from Wiktionary, CC BY-SA 4.0.