首页  英汉  汉英  英英  词组  用法  例句  同义词  写作  俚语  缩写  词源  词根  法汉  德汉  日汉  俄汉  韩汉  西汉  意汉  泰汉  越汉

单词	quaternary ammonium compound
释义	quaternary ammonium compound noun : any of numerous strong bases and their salts derived from ammonium by replacement of the hydrogen atoms with organic radicals and important especially as surface-active agents, disinfectants, and drugs Example Sentences Recent Examples on the Web The Environmental Working Group’s senior research and database analyst Samara Geller told Apartment Therapy that dryer sheets contain a potentially harmful chemical called quaternary ammonium compounds (QACS). Megan Schaltegger, House Beautiful, 30 Apr. 2019 Word History First Known Use circa 1934, in the meaning defined above Medical Definition quaternary ammonium compound noun : any of numerous strong bases and their salts derived from ammonium by replacement of the hydrogen atoms with organic radicals and important especially as surface-active agents, disinfectants, and drugs called also quat, quaternary
随便看	tappoon taprobane taproom taprooms taproot taproots taps taps out tapsal-teerie tapster tapsters tapu tapus Tapuya tapuyas taqiya taqiyah taqlid Taquari taqueria taquería tar tar acid tar and feather tar baby

英语词典包含469781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。