wild senna

noun

: any of various plants of the genus Cassia

especially : a North American perennial herb (C. marilandica) the leaves of which are used medicinally in the same manner as the officinal senna

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