G0845
αὐτόπτης
eyewitness
seeing oneself, an eyewitness , (Herdotus Historicus) (ML)
Full Thayer's lexicon entry
αὐτόπτης — autóptēs
αὐτόπτης, ἀυτοπτου, ὁ (αὐτός, ὈΠΤΩ), seeing with one's own eyes, an eye-witness (cf. ἀυτηκως one who has himself heard a thing): Luk 1:2. (In Greek writings from Herodotus down.)
1 occurrence