underwire /ˈʌndɚˌwajɚ/ noun plural underwires
plural underwires
Learner's definition of UNDERWIRE
[count, noncount] chiefly US
: wire running through the bottom edge of a brassiere to provide support for a woman's breasts（胸罩的）钢托，下撑金属条
— underwire
(chiefly US) or British underwired /ˈʌndɚˌwajɚd/ adjective