Dorsum of penis
Dorsum penis
Definition
A shallow groove which marks their junction on the upper surface (Dorsum of penis) lodges the deep dorsal vein of the penis.
References
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).