τρίειδος
From LSJ
Δύο γὰρ, ἐπιστήμη τε καὶ δόξα, ὧν τὸ μὲν ἐπίστασθαι ποιέει, τὸ δὲ ἀγνοεῖν → Two different things are science and belief: the one brings knowledge, the other ignorance
English (LSJ)
ον, (εἶδος IV)
A composed of three ingredients, ἔμπλαστρος Aët.15.15: cf. ἑξάειδος, ἑπτάειδος, τετράειδος.