underwing

1 of 2

noun

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

2 of 2

adjective

: placed or growing underneath the wing
underwing rockets

Examples of underwing in a Sentence

Recent Examples on the Web
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Noun
Another new element of the Next Gen car is an underwing, a series of panels underneath the car to make a single flat surface to help with aerodynamics and increase stability in traffic. Michelle R. Martinelli, USA TODAY, 17 Feb. 2022

Word History

First Known Use

Noun

1535, in the meaning defined at sense 1

Adjective

1896, in the meaning defined above

Time Traveler
The first known use of underwing was in 1535

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Cite this Entry

“Underwing.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underwing. Accessed 23 Mar. 2025.

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