雨层云 Traditional form: 雨層雲 Pinyin (reading): yǔcéngyún Definitions: nimbostratus stratus rain cloud Characters: 雨 - rain 层 - layer, floor, story, stratum 云 - cloud; to say, to speak Traditional characters: 雨 - rain 層 - layer, floor, story, stratum 雲 - cloud; to say, to speak