腕わん甲こう

noun

vambrace; brassard; rerebrace

Historical armor term for a piece protecting the forearm or upper arm. Used in contexts of traditional Japanese or Western armor.

• 鎧よろいの腕わん甲こうは、矢やや刀かたなから腕うでを守まもるために使つかわれた。

  The vambrace of the armor was used to protect the arm from arrows and swords.