天演论 Traditional form: 天演論 Pinyin (reading): tiānyǎnlùn Definitions: the theory of evolution (early translation, since replaced by 進化論/进化论) Characters: 天 - sky, heaven; god, celestial 演 - to perform, to act, to put on a play 论 - debate; discussion Traditional characters: 天 - sky, heaven; god, celestial 演 - to perform, to act, to put on a play 論 - debate; discussion