noun tet·ra·he·drite

Definition of tetrahedrite



  1. :  a fine-grained gray mineral (Cu,Fe)12Sb4S13 that is isomorphous with tennantite, consists of a sulfide of copper, iron, and antimony and often also contains zinc, lead, mercury, or silver, occurs in characteristic tetrahedral crystals and also in massive form, and is often a valuable ore of silver and is also worked for copper (hardness 3–4, specific gravity 4.4–5.1)

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 tetrahedrite

German tetraëdrit, from Late Greek tetraedros having four faces + German -it -ite

Seen and Heard

What made you want to look up tetrahedrite? 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!