adder stone

noun

: a precious stone formerly believed to be efficacious in drawing out poison

especially : a highly absorbent aluminous gem

Word History

Etymology

so called from the belief that it is formed by adders and is efficacious against snakebite

First Known Use

1872, 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