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mesentery (n.)

"a fold of the peritoneum," early 15c., mesenterie, from medical Latin mesenterium "middle of the intestine," from medical Greek mesenterion, literally "the middle intestine," from mesos "middle" (from PIE root *medhyo- "middle") + enteron "intestine" (from PIE *enter-, comparative of root *en "in"). Related: Mesenteric.

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