(Biology)a supporter of the theory that all life forms gradually progress or evolve to a higher form (生)生命形式进步论者
an advocate of or believer in political or social progress (政治或社会问题上)进步论者
adjective
(Biology)(of a person or theory) supporting or based on the theory that all life forms progress or evolve to a higher form (生)(人,理论)支持生命形式进步论的 progressionist evolutionists. 主张进步论的进化论者。