from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A lustrous indigo-blue mineral, CuS, an important ore of copper.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A shiny indigo-blue sulfide mineral, CuS, that is an ore of copper.
from The Century Dictionary and Cyclopedia
- n. Same as covellin.
After Nicolò Covelli (1790-1829), Italian mineralogist.(American Heritage® Dictionary of the English Language, Fourth Edition)
For Nicolò Covelli, Italian mineralogist, + -ite. (Wiktionary)