water hyssop

noun

: any of several plants of the genus Bacopa

especially : the small widely distributed creeping herb (B. monniera) that is used locally in India as an aperient and diuretic

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