beryllonite

noun

be·​ryl·​lo·​nite

bə-ˈri-lə-ˌnīt

plural -s

: a mineral NaBePO₄ consisting of sodium beryllium phosphate occurring in light-colored topazlike orthorhombic crystals (hardness 5.5–6, specific gravity 2.85)

Word History

Etymology

New Latin beryllium + English -on + -ite

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