plural -s
: a mineral consisting of a dark gray or black massive lead antimony tin sulfide (specific gravity 5.55)

Word History


German franckeït, from Carl and Ernest Francke, 19th century German mining engineers + German -it -ite

First Known Use

1893, in the meaning defined above

Time Traveler
The first known use of franckeite was in 1893

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!

Dictionary Entries Near franckeite

Cite this Entry

“Franckeite.” Dictionary, Merriam-Webster, Accessed 21 Feb. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!