underwing

noun
un·​der·​wing | \ ˈən-dər-ˌwiŋ How to pronounce underwing (audio) \

Definition of underwing

 (Entry 1 of 2)

1 : one of the posterior wings of an insect
2 : any of various noctuid moths (especially genus Catocala) that have the hind wings banded with contrasting colors (such as red and black)

called also underwing moth

3 : the underside of a bird's wing

underwing

adjective

Definition of underwing (Entry 2 of 2)

: placed or growing underneath the wing underwing rockets

First Known Use of underwing

Noun

1535, in the meaning defined at sense 1

Adjective

1896, in the meaning defined above

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The first known use of underwing was in 1535

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