Source : Webster's Revised Unabridged Dictionary (1913)

Vantbrace \Vant"brace\, Vantbrass \Vant"brass\, n. [F. avant
   fore + bras arm: cf. F. brassard armor for the arm, brace,
   forearm. Cf. {Vambrace}.] (Anc. Armor)
   Armor for the arm; vambrace. --Milton.