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)
STRONG'S WORD STUDY
G2375 — θυρεός
thureos · long shield · Greek