dumontite

noun

du·​mont·​ite

ˈd(y)üˌmänt‧ˌīt

plural -s

: a hydrated phosphate Pb₂(UO₂)₃(PO₄)₂(OH)₄.3H₂O of uranium and lead occurring in yellow orthorhombic crystals

Word History

Etymology

French dumontite, from André Dumont †1857 Belgian geologist + French -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