Mid 19th century; earliest use found in Robert Mayne (1808–1868). From (i) post-classical Latin panspermia or its etymon (ii) ancient Greek πανσπερμία panspermia; compare -y.
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。