Entomology definition of Umbilicus September 14, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Umbilicus Entomology definition of Umbilicus: a navel, or navel-like depression. Entomology Umbilicus definitionUmbilicus Entomology explanationUmbilicus Entomology meaningReviews & Comments