同温层 Traditional form: 同溫層 Pinyin (reading): tóngwēncéng Definitions: stratosphere Characters: 同 - same, similar; together with, alike 温 - warm, lukewarm 层 - layer, floor, story, stratum Traditional characters: 同 - same, similar; together with, alike 溫 - warm, lukewarm 層 - layer, floor, story, stratum