Definitions

from The Century Dictionary.

  • noun A native hydrous iron phosphate, generally massive with radiated fibrous structure. It has a dark-green color, but changes on exposure to yellow or brown.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Min.) A mineral of a blackish green color, commonly massive or in nodules. It is a hydrous phosphate of iron.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun mineralogy A blackish-green mineral that is a hydrous phosphate of iron.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Dufrénoy +‎ -ite, after French geologist Pierre Armand Dufrénoy.

Examples

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