τρίειδος
From LSJ
τὸ ἀγαθὸν αἱρετόν· τὸ δ' αἱρετὸν ἀρεστόν· τὸ δ' ἀρεστὸν ἐπαινετόν· τὸ δ' ἐπαινετὸν καλόν → what is good is chosen, what is chosen is approved, what is approved is admired, what is admired is beautiful
English (LSJ)
ον, (εἶδος IV)
A composed of three ingredients, ἔμπλαστρος Aët.15.15: cf. ἑξάειδος, ἑπτάειδος, τετράειδος.