| 1. | Judaism. either of two small, black, leather cubes containing a piece of parchment inscribed with verses 4–9 of Deut. 6, 13–21 of Deut. 11, and 1–16 of Ex. 13: one is attached with straps to the left arm and the other to the forehead during weekday morning prayers by Orthodox and Conservative Jewish men. |
| 2. | (in the early Christian church) a receptacle containing a holy relic. |
| 3. | an amulet, charm, or safeguard against harm or danger. |
rion outpost, safeguard, amulet, equiv. to phylak-, s. of phylássein to protect, guard + -tērion n. suffix denoting place; r. ME philaterie < ML philatērium, for LL, as above
"Ye shall bind them [my words] for a sign upon your hands, and they shall be for frontlets between your eyes." [Deut. xi.18]
phylactery
in Jewish religious practice, one of two small, black leather, cube-shaped cases containing Torah texts written on parchment, which, in accordance with Deuteronomy 6:8 (and similar statements in Deuteronomy 11:18 and Exodus 13:9, 16), are to be worn by male Jews of 13 years and older as reminders of God and of the obligation to keep the Law during daily life. The name phylactery is derived from the Greek phylakterion, meaning amulet.
Learn more about phylactery with a free trial on Britannica.com.