单词	retroperitoneal
释义	retroperitoneal adjective ret·​ro·​per·​i·​to·​ne·​al ˌre-trō-ˌper-ə-tə-ˈnē-əl  : situated behind the peritoneum retroperitoneally ˌre-trō-ˌper-ə-tə-ˈnē-ə-lē  adverb Word History First Known Use 1835, in the meaning defined above Medical Definition retroperitoneal adjective ret·​ro·​per·​i·​to·​ne·​al -ˌper-ət-ᵊn-ˈē-əl  : situated or occurring behind the peritoneum retroperitoneal bleeding a retroperitoneal tumor
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