rectosigmoid

Medical Dictionary

rectosigmoid rec·to·sig·moid (rěk'tō-sĭg'moid')
n.

  1. The rectum and the sigmoid colon considered as a unit.

  2. The junction of the rectum and the sigmoid colon.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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WordNet
rectosigmoid

adjective
of or related to or near the sigmoid colon and the upper part of the rectum 
WordNet® 3.0, © 2006 by Princeton University.
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