from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An iron silicate with a dark-brown or black color, formula Fe3+2Si2O5(OH)4·2H2O.
from the GNU version of the Collaborative International Dictionary of English
- n. A soft black, iron ore, nearly earthy, a hydrous silicate of iron.
from The Century Dictionary and Cyclopedia
- n. A hydrous iron silicate, occurring in amorphous compact masses of a black to brownish-black color and conchoidal fracture, in various localities of Scandinavia.
Hisinger + -ite after Wilhelm Hisinger, Swedish chemist. (Wiktionary)