ilsemannite

noun

il·​se·​mann·​ite

ˈil(t)səməˌnīt,

ˈilzə-

plural -s

: a mineral Mo₃O₈·nH₂O(?) consisting of black, blue-black, or blue earthy massive hydrous oxide or perhaps sulfate of molybdenum

Word History

Etymology

German ilsemannit, from J. C. Ilsemann †1822 German mining commissioner + German -it -ite

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!