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noun Mineralogy.
  1. an amorphous hydrated ferric oxide, varying in color from dark brown to yellow, used as an ore of iron.
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Origin of limonite

1815–25; < Greek leimṓn meadow + -ite1
Related formsli·mo·nit·ic [lahy-muh-nit-ik] /ˌlaɪ məˈnɪt ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for limonite


  1. a common brown, black, or yellow amorphous secondary mineral that consists of hydrated ferric oxides and is a source of iron. Formula: FeO(OH). n H 2 O
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Derived Formslimonitic (ˌlaɪməˈnɪtɪk), adjective

Word Origin

C19: probably from Greek leimōn, translation of earlier German name, Wiesenerz meadow ore
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012