Within the stomach.
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in·tra·gas·tric -'gas-trik adj situated or occurring within the stomach <\intragastric intubation>
in·tra·gas·tri·cal·ly -i-k(ə-)lē adv
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in·tra·gas·tric (in″trə-gasґtrik) situated or occurring within the stomach; called also endogastric.Medical dictionary. 2011.