achroite

noun

ach·​ro·​ite

ˈa-krə-¦wīt

plural -s

1

: a colorless variety of tourmaline

2

: a gem cut from achroite

Word History

Etymology

German achroit, from achro- + -it -ite

First Known Use

1849, in the meaning defined at sense 1

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