brassard
/ˈbræsɑːd/noun
1- a band worn on the sleeve, typically with a uniform臂章, 袖章。
1.1
- historical a piece of armour for the upper arm〈史〉臂铠。
词源
late 16th cent. (denoting a piece of armour for the upper arm)： from French， from bras 'arm'.