phalera
noun
phal·era
ˈfalərə
plural phalerae
-əˌrē,
-ˌrī
: a metal boss or disk (as of bronze or silver) worn in ancient times on the heads or breasts of horses or sometimes by men as signs of military rank
also : a cameo worn as an ornament
Word History
Etymology
Latin, from Greek phalara, plural; akin to Greek phalos horn of a helmet and probably to Sanskrit hvarate he bends, hruṇāti he gets lost