We found 3 definitions of underwings from 2 different sources.
NounPlural: underwings |
||
underwing - moth having dull forewings and brightly colored hind wings | ||
noctuid, noctuid moth, owlet moth usually dull-colored medium-sized nocturnal moth; the usually smooth-bodied larvae are destructive agricultural pests | ||
catacala, genus catacala moths whose larvae are cutworms: underwings |