umbilical hernia

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A usually self-correcting hernia of the intestines in which protrusion occurs through the abdominal wall in the region of the navel.

Wiktionary

1. n. pathology A hernia at the site of the umbilicus.

GNU Webster's 1913

1. adj. (Med.) hernia of the bowels at the umbilicus.

WordNet 3.0

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