Lexical Definition

‎μονόφθαλμος‎ monóphthalmos (mon-of'-thal-mos) one-eyed ^G:A
from ‎μόνος‎ and ‎ὀφθαλμός‎

with one eye.

• one-eyed

Abbott-Smith

* μον-όφθαλμος, -ον (< μόνος), Ionic and κοινή,
one-eyed, having one eye: Mt 18:9, Mk 9:47.†

Abbott-Smith References

Liddell-Scott-Jones

μονόφθαλμος-όφθαλμος,

Ionic dialect μουν-, ον, one-eyed, [NT+5th c.BC+]; explained as one who has one eye, like the Cyclops, opposed to ἑτερόφθαλμος, one who has lost an eye, [Refs 1st c.AD+]

_{LSJ Scripture Refs: Matt.18.9}