μονόπτωτος
From LSJ
Ῥῦσέ με δεινῶν νοσημάτων, ἱερώτατε, ἱερωσύνην συναρμόσας ἐν χαρᾷ και ἐπιστήμης τὸ πολύτιμον κεφάλαιον → Deliver me from grievous afflictions, most holy one, joining sanctity together in joy with the precious fountainhead of knowledge
English (LSJ)
ον,
A with but one case, A.D.Synt.29.1, Porph.in Cat. 62.4.