gas·tro·scope 
(găstrə-skōp′)
(găstrə-skōp′)n.
An endoscope that is inserted through the mouth and used for examining the interior of the stomach.
gas′tro·scopic (-skŏpĭk) adj.
gas·trosco·pist (gă-strŏskə-pĭst) n.
gas·trosco·py (-kə-pē) n.