1920s; earliest use found in Scientific Monthly. From either predat- or classical Latin praedāt-, past participial stem of praedārī to plunder, spoil + -ism, perhaps after French prédatisme.
英语词典包含243303条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。