Judaism . either of two small, black, leather cubes containing a piece of parchment inscribed with verses 4–9 of Deuteronomy 6, 13–21 of Deuteronomy 11, and 1–16 of Exodus 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.

(in the early Christian church) a receptacle containing a holy relic.