ἐξόμφαλος

ον, Subst., ὁ
A. with prominent navel, as in umbilical hernia, Gal. 7.730.
II. as Subst., ἐξόμφαλος,ὁ, prominent navel, Dsc. 4.69, Gal. 19.444, Paul.Aeg. 6.51.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project