bathing trunk nevus

[bāðĭng]
n.
  1. A congenital nevus that is large, hairy, and pigmented and that usually occurs on the lower trunk of the body.tierfellnaevus
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.