Late 19th century; earliest use found in Asa Gray (1810–1888), botanist. From ob- + diplo- + stemon- (in -stemonous) + -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。