1491 eídos (a neuter noun derived from 1492 /eídō, "to see, apprehend") – properly, the sight (i.e. of something exposed, observable), especially its outward appearance or shape (J. Thayer). 1491 (eídos) emphasizes "what is physically seen" (BAGD) before mentally or spiritually apprehended. See 1492 (eidō, oida).

Example: 1491 /eídos ("visible appearance") refers to the outward form taken on by each of the three Persons of the tri-personal God: a) the Holy Spirit in Lk 3:22: "And the Holy Spirit descended upon Him in bodily form like a dove"; b) Jesus, in Lk 9:29: "And while He was praying, the appearance of His face became different, and His clothing became white and gleaming"; and c) the Father, in Jn 5:37: "You have neither heard His voice at any time, nor seen His form."

From eido; a view, i.e. Form (literally or figuratively) -- appearance, fashion, shape, sight.

see GREEK eido

ἔθη — 2 Occ.
ἔθει — 1 Occ.
ἔθεσι — 1 Occ.
ἔθεσιν — 1 Occ.
ἐθῶν — 1 Occ.
ἔθος — 6 Occ.
εἰώθει — 2 Occ.
εἰωθὸς — 2 Occ.
Εἰ — 508 Occ.
μή¦γε — 8 Occ.
εἶδος — 2 Occ.
εἴδους — 2 Occ.
ᾔδει — 14 Occ.
ᾔδειν — 5 Occ.
ᾔδεις — 3 Occ.
ᾔδεισαν — 8 Occ.
ᾔδειτε — 3 Occ.
εἰδῇς — 1 Occ.
εἰδήσουσίν — 1 Occ.
εἰδῆτε — 6 Occ.