Dictionaryascend'ing co'lonPronunciation: (kō'lun), [key] Anat. the first portion of the colon, beginning at the cecum in the lower right abdominal cavity and continuing upward along the right posterior abdominal wall to approximately the lower ribs. See diag. under intestine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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