limonite

Noun. (mineralogy) any of several natural hydrous iron oxides; often a mixture of goethite and hemite with clays and manganese oxide.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.

This entry was last updated on RefTopia from its source on 3/20/2012.