salt-marsh caterpillar

noun

: a hairy caterpillar that is the larva of an American moth (Estigmene acrea) of the family Arctiidae and that is destructive to various crop plants

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now