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Within the peritoneal cavity.
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in·tra·per·i·to·ne·al .in-trə-.per-ət-ən-'ē-əl adj situated within or administered by entering the peritoneum
in·tra·per·i·to·ne·al·ly -'ē-ə-lē adv
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in·tra·peri·to·ne·al (in″trə-per″ĭ-to-neґəl) within the peritoneal cavity; called also endoperitoneal.Medical dictionary. 2011.