hemlock looper

noun

variants or less commonly hemlock spanworm

: a greenish looper that is the larva of a rather plain buff or gray geometrid moth (Lambdina fiscellaria) of most of North America, that feeds on hemlock and other conifers and oak, and that is sometimes a serious defoliator

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