American watercress

noun

: a weak perennial herb (Cardamine rotundifolia) found in cold springs in the eastern U.S. having undivided leaves and thin pods

Word History

First Known Use

circa 1817, in the meaning defined above

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