umbilical hernia

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A hernia in which part of the intestine protrudes through the abdominal wall under the skin in the region of the navel.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun pathology A hernia at the site of the umbilicus.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun protrusion of the intestine and omentum through a hernia in the abdominal wall near the navel; usually self correcting after birth