lepidocrocitePronunciation: /ˌlɛpɪdə(ʊ)ˈkrəʊsʌɪt/Definition of lepidocrocite noun [mass noun] a red to reddish-brown mineral consisting of ferric hydroxide, typically occurring as scaly or fibrous crystals. Origin: early 19th century: from Greek lepis, lepid- 'scale' + krokis 'fibre'lepidocrocite in other Oxford dictionaries Definition of lepidocrocite in the US English dictionary