vam·brace 
(vămbrās′)
(vămbrās′)n.
A piece of armor used to protect the forearm.
[Middle English vambras, from Anglo-Norman vauntbras : vaunt (variant of Old French avaunt, before; see VANGUARD) + bras, arm; see BRACER2.]
vambrace1545 portrait of Cosimo I de Medici (1519-1574) wearing a vambrace, by Agnolo Bronzino (1503-1572)