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Meaning of mesorectum

mes•o•rec•tum

Pronunciation: (mez"u-rek'tum, mes"-, mē"zu-, -su-), [key]
— pl. -tums, -ta
  1. the mesentery of the rectum.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.