epistolium
From LSJ
ἡδονήν, μέγιστον κακοῦ δέλεαρ → pleasure, the greatest incitement to evildoing | pleasure, a most mighty lure to evil | pleasure, the great bait to evil
Latin > English (Lewis & Short)
ĕpīstŏlĭum: ii, n., = ἐπιστόλιον,
I a short letter, note, Cat. 68, 2.