θυρεός, θυρεοῦ, ὁ (from θύρα, because shaped like a door (cf. Winers Grammar, 23)), a shield (Latinscutum); it was large, oblong, and four-cornered: τόν θυρεόν τῆς πίστεως, equivalent to τήν πίστιν ὡς θυρεόν, Eph_6:16. It differs from ἀσπίς (Latinclipeus), which was smaller and circular. (Polybius, Dionysius Halicarnassus, Plutarch, others.)

θυρεός thureos 1x a stone or other material employed to close a doorway; later, a large oblong shield, Eph_6:16

θυρεός , -οῦ , ὁ ( < θύρα ), [in LXX for H4043 , H6793 ;] 1. in Hom ., a door-stone. 2. In late Gk . ( Polyb ., Plut .), the scutum , a large oblong shield: θ . τ . πίστεως , Eph_6:16 ( cf. Wis_5:20 , where ὁσιότης is likened to the ἀσπίς , the clypeus or small round shield of the light-armed soldier).†

θυρεός [page 294] For the late usage of this word for the long oblong shield of Roman equipment (cf. Polyb. vi. 23. 2), as in Eph_6:16 , see PSI IV. 428 .35 (iii/B.C.) ὅπλα ἀσπὶς φαρότρα θυρεός .

θυρεός θυ^ρεός, ὁ, [Etym: θύρα] "a stone put against a door" to keep it shut, "a door-stone", Od. "a large oblong shield (like a door)", opp. to ἀσπίς (the round shield), as Lat. scutum to "clipeus", ap. Plut.

θυρεός, -οῦ, ὁ (θύρα), [in LXX for מָגֵן, צִנָּה ;] __1. in Hom., a door-stone. __2. In late Gk. (Polyb., Plut.), the scutum, a large oblong shield: θ. τ. πίστεως, Eph.6:16 (cf. Wis.5:20, where ὁσιότης is likened to the ἀσπίς, the clypeus or small round shield of the light-armed soldier).† (AS)