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esoph·a·go·gas·tros·co·py
variants:
or chiefly British oesophagogastroscopy \ -ˌgas-ˈträs-kə-pē 
\
\ plural esophagogastroscopies
Medical Definition of esophagogastroscopy
: examination of the interior of the esophagus and stomach by means of an endoscope
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