Late 19th century; earliest use found in Henry Morton Stanley (1841–1904), explorer and journalist. From pro- + -gnathy, after prognathous and prognathic.
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。