from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A white, yellow, or gray mineral, chiefly BaCO3.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A yellow-grey mineral form of barium carbonate, BaCO3
from the GNU version of the Collaborative International Dictionary of English
- n. Barium carbonate occurring in white or gray six-sided twin crystals, and also in columnar or granular masses.
from The Century Dictionary and Cyclopedia
- n. Native barium carbonate.
German Witherit, after William Withering (1741-1799), British physician.(American Heritage® Dictionary of the English Language, Fourth Edition)
After the English physician and mineralogist William Withering (1741-1799) in 1790. (Wiktionary)