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• A mineral of foliated texture composed of silicic acid, titanic acid, and lime.

1914 - Nuttall's Standard dictionary of the English language
By Nuttall, P.Austin.

• A mineral composed of silica, titanic acid, and lime, found crystallised, and in granular or foliated masses, of a brown, grey, and yellow colour.

1874 - Etymological and pronouncing dictionary of the English language
By Stormonth, James, Phelp, P. H.