φυλακτήριον, -ου, τό

__1. an outpost, fortification (Thuc. al.).

__2. a safeguard (Plat.).

__3. an amulet (Plut. al.); in NT for the Talmudic תְּפִלִּין, a prayer fillet, a phylactery, a small strip of parchment on which portions of the law were written and worn on the forehead and next the heart (cf. Exo.13:16): Mat.23:5.†

(AS)

an outpost, fortification; a safeguard; an amulet; a prayer fillet, a phylactery