noun jo·han·nite \jōˈhaˌnīt\

Definition of johannite



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

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.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of johannite

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

Seen and Heard

What made you want to look up johannite? Please tell us where you read or heard it (including the quote, if possible).


capable of being understood in two ways

Get Word of the Day daily email!