noun
or gö·thite ]d.īt, ]ˌtīt
( -s )
Etymology: German göthit, from J. W. von Goethe + German -it -ite
: a mineral HFeO 2 consisting of an iron hydrogen oxide that occurs massive and in prismatic crystals with a fibrous, reniform, or stalactic structure and that is the commonest constituent of many forms of natural rust or limonite especially in the gossans of sulfide-bearing ore deposits — compare lepidocrocite