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he·mo·peri·to·ne·um or chiefly Brit hae·mo·peri·to·ne·um -.per-ət-ən-'ē-əm n blood in the peritoneal cavity
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he·mo·peri·to·ne·um (he″mo-per″ĭ-to-neґəm) [hemo- + peritoneum] an effusion of blood in the peritoneal cavity.Medical dictionary. 2011.