[ 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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019