σαρκόμφαλον
From LSJ
ὁποία δ' ἦν αὕτη ἡ παίδευσις δύναταί τις γιγνώσκειν διάλογόν τινα τοῦ Πλάτωνος σκοπῶν → It's possible to find out what kind of education that was by examining one of Plato's dialogues
English (LSJ)
τό, fleshy excrescence on the navel, Gal.19.445.
German (Pape)
[Seite 863] τό, Fleischgewächs am Nabel, Medic.
Greek (Liddell-Scott)
σαρκόμφᾰλον: τό, πρήξιμον σκιρρῶδες τοῦ ὀμφαλοῦ, Γαλην.