rectosigmoid

[ rĕk′tō-sĭgmoid′ ]

n.

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