underwing

/ˌʌndərˈwɪŋ/

Other forms: underwings

Definitions of underwing

1. noun

   moth having dull forewings and brightly colored hind wings
   types:

   Catocala nupta, red underwing

   moth having dull forewings and red-marked hind wings

   type of:

   noctuid, noctuid moth, owlet moth

   usually dull-colored medium-sized nocturnal moth; the usually smooth-bodied larvae are destructive agricultural pests