rectourethral muscle

[rĕk′tō-yu-rēthrəl]
n.
  1. Smooth muscle fibers that pass forward from the longitudinal muscle layer of the rectum to the spongy membrane just beyond the bulb of the penis.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.