Liddell-Scott-Jones

ἔντερον (enteron) innards ^G:N-N

ἔντερον, τό,

piece of the guts or intestines, ἐϋστρεφὲς ἔντερον οἰός a string of sheep's gut, [Refs 8th c.BC+]guts, bowels, [Refs 8th c.BC+]: in singular, gut, bowel, [Refs 5th c.BC+]; collectively, bowels, [Refs 4th c.BC+]; womb, belly, [Refs 7th c.BC+]; ἐπὶ μετρίῳ ἐντέρῳ for moderation in eating,[LXX+6th c.AD+]: metaphorically, inside of fruit, [Refs]

__II ἔντερα γῆς earth-worms, [Refs 4th c.BC+]; but worm-casts, [Refs 4th c.BC+]
__III bag made of gut, [Refs 5th c.BC+] *en-tero-, comparative of *en 'in'.)