Definition of walnut moth
: any of several moths whose larvae eat the foliage of the walnut: such as a : regal moth b : imperial moth c : luna moth d : any of several red underwings of the genus Catocala e : a dagger moth (Acronicta americana) found also on the maple f : any of three arctiid moths of the genus Halisidota (H. caryae, H. tesselaris, H. maculata) g : a moth (Datana integerrima) whose larva feeds on and often defoliates walnut, hickory, birch, oak, chestnut, linden, and apple
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Seen and Heard
What made you want to look up walnut moth? Please tell us where you read or heard it (including the quote, if possible).