underwing
/ˈʌndəwɪŋ/noun
1
- the hindwing of an insect, especially when it is normally hidden by a forewing后翅。
2
- the underside of a bird's wing鸟翼下部。
3
- （亦作underwing moth）[usu. with modifier] a moth with drab forewings and brightly coloured hindwings, typically yellow with a black terminal band夜蛾。
3.1
- Several genera in the family Noctuidae夜蛾科中数属。