Definition of fayalite
: a mineral Fe2SiO4 consisting of an iron silicate isomeric with olivine and occurring in crystals or massive (specific gravity 4.1)
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!
Origin and Etymology of fayalite
German fayalit, from Fayal, island in the Azores + German -it -ite
Seen and Heard
What made you want to look up fayalite? Please tell us where you read or heard it (including the quote, if possible).