Early 20th century; earliest use found in Independent. From German Agmatin, probably from A- (in Amino-) + g- (in Guanidin) + -ma- (in Ptomain) + -in, with insertion of -t- apparently for euphony.
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。