Definitions

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.

Etymologies

Hisinger +‎ -ite after Wilhelm Hisinger, Swedish chemist. (Wiktionary)

Examples

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