button snakeweed

noun

: a very spiny plant (Eryngium leavenworthii) of the central U.S. with palmately divided leaves and heads of flowers resembling thistles

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