rerebrace

[ reer-breys ]
/ ˈrɪərˌbreɪs /

noun Armor.

a piece of plate armor for the upper arm; an upper cannon. Compare vambrace(def 1).

Origin of rerebrace

1300–50; Middle English, equivalent to rere- (< Middle French rere, riere behind, backward < Latin retrō- retro-) + brace