urethral crest

n.
  1. In the female, a conspicuous longitudinal fold of mucosa on the posterior wall of the urethra.
  2. In the male, a longitudinal fold on the posterior wall of the urethra extending from the uvula of the bladder through the part of the urethra that tranverses the bladder.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.