*† κατοπτρίζω (< κάτοπτρον, a mirror), to show as in a mirror. Mid., to see oneself mirrored (v. MM, Exp., xv); c. acc. rei (R, txt., but v. mg.), to reflect as a mirror: II Co 3:18 (cf. Abbott, Essays, 94).†
Henry George Liddell, Robert Scott, A Greek-English Lexicon
κατοπτρ-ίζω, show as in a mirror or by reflexion, τοῦ-ίζοντος τὴν ἶριν ἀστέρος “Placita Philosophorum” 3.5.11 :—passive, to be mirrored, Anonymus “Oxy.” 1609.19. __IImiddle, look into a mirror, behold oneself in it, Zeno Citieus Stoicus 1.66, Sextus Empiricus Philosophus “Πυρρώνειοι ὑποτυπώσεις” 1.48, Athenaeus Epigrammaticus 15.687c, etc. __II.2behold as in a mirror, ἰδέαν Philo Judaeus 1.107; δόξαν Κυρίου NT.2Cor.3.18 (but here perhaps reflect).