underwing

un·der·wing  (ndr-wng)

n.

1. One of a pair of hind wings of an insect, such as a moth.

2. Any of various noctuid moths of the genus Calocala, having brightly colored hind wings visible only during flight.

Thesaurus

Noun

1.

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 Catocala nupta, red underwing - moth having dull forewings and red-marked hind wings