from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A green radioactive mineral that is a hydrous crystalline phosphate of uranium and copper.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A radioactive green phosphate mineral, isostructural with autunite, found in granites and other uranium-bearing deposits as a secondary mineral.
from the GNU version of the Collaborative International Dictionary of English
- n. A mineral occurring in emerald-green tabular crystals having a micaceous structure. It is a hydrous phosphate of uranium and copper. Called also copper uranite, and chalcolite.
from The Century Dictionary and Cyclopedia
- n. A native phosphate of uranium and copper, occurring in square tabular crystals of a bright-green color, pearly luster, and micaceous cleavage. Also called chalcolite, and copper uranite.
After Torbern Olof Bergman (1735-1784), Swedish chemist.(American Heritage® Dictionary of the English Language, Fourth Edition)
Torbern Bergman (1735-1784), Swedish chemist, and -ite. (Wiktionary)