岩土体 Traditional form: 岩土體 Pinyin (reading): yántǔtǐ Definitions: gneiss Characters: 岩 - cliff; rocks; mountain 土 - soil, earth; items made of earth 体 - body; group, class; form, style, system Traditional characters: 岩 - cliff; rocks; mountain 土 - soil, earth; items made of earth 體 - body; group, class; form, style, system