pyrargyrite

noun

pyr·​ar·​gy·​rite

pīˈrärjəˌrīt,

pə̇ˈr-

plural -s

: a silver antimony sulfide Ag₃SbS₃ that is isomorphous with proustite, occurs in rhombohedral crystals or massive, and has a dark-red or black color with a metallic adamantine luster

called also dark red silver ore, ruby silver

Word History

Etymology

German pyrargyrit, from pyr- + argyr- + -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!