(from the article `gastroenterology`) ...that could be inserted down the esophagus and upon which a light was mounted to illuminate the area visualized was invented in about 1889; this ... Found on http://www.britannica.com/eb/a-z/g/12
A thin, tube-like instrument used to examine the inside of the stomach. A gastroscope has a light and a lens for viewing and may have a tool to remove tissue. Found on http://www.cancer.gov/dictionary?expand=G
(gas´tro-skōp) an endoscope especially designed for passage into the stomach to permit examination of its interior. The gastroscope is a hollow, cylindrical tube fitted with special lenses and lights. The newer types of gastroscope are made of glass fiber (fiberscope) which is more flexible. Each glass fiber ... Found on http://www.encyclo.co.uk/local/21001
Gas'tro·scope noun [ Gastro- + -scope .] (Medicine) An instrument for viewing or examining the interior of the stomach. Found on http://www.encyclo.co.uk/webster/G/12
Gastroscope: A flexible, lighted instrument that is put through the mouth and down the esophagus to view the stomach. Tissue from the stomach can also be removed through the gastroscope. Found on http://www.medterms.com/script/main/art.asp?articlekey=3557