ancile

noun, plural an·cil·i·a [an-sil-ee-uh, ahng-kil-] /ænˈsɪl i ə, ɑŋˈkɪl-/. Roman Religion.

1. a shield given by Mars to Numa Pompilius as the palladium of Rome.
2. any of 11 counterfeits of this shield, carried with it on ceremonial occasions.