页岩油 Traditional form: 頁岩油 Pinyin (reading): yèyányóu Definitions: shale oil Characters: 页 - page, sheet, leaf 岩 - cliff; rocks; mountain 油 - oil, fat, grease, lard; oil paints Traditional characters: 頁 - page, sheet, leaf 岩 - cliff; rocks; mountain 油 - oil, fat, grease, lard; oil paints