johannite

noun

jo·​han·​nite

jōˈhaˌnīt

plural -s

: a mineral Cu(UO₂)₂(SO₄)(OH)₂.6H₂O consisting of a green hydrous basic uranyl copper sulfate that occurs in massive form

Word History

Etymology

German johannit, from Archduke Johann (John) of Austria †1859 Austrian general, founder of a museum in Graz, Austria + German -it -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