from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A black crystalline compound, MnO2, used as a depolarizer of dry-cell batteries and in textile dyeing.
from the GNU version of the Collaborative International Dictionary of English
Sorry, no etymologies found.
Ayla reached for her amulet and felt for the fifth object she carried in it now: a piece of black manganese dioxide nestled in the small pouch along with the three nodules of iron pyrite stuck together, a red-stained oval of mammoth ivory, the fossil cast of a gastropod, and a chunk of red ochre.