出典:Wiktionary
Attested since at least 1676[1] for arm-armour (see brassard). Application to helmets dates to at least the 1840s,[2] of obscure origin, perhaps a misinterpretation: an early mention in Alphonso Wood's 1845 Class-book of Botany defines it broadly ("Eng. brasset signifies a helmet または target", i.e. shield), and around this time antiquarians spread mistaken definitions of several other armor terms (e.g. manefaire, passguard).
brasset (複数形 brassets)