单词	helixometer
释义	helixometer noun helix·​om·​e·​ter : a tubular instrument in which an electric light and a prism and lens system enable visual examination of a small-arms bore (as in criminal investigation) Word History Etymology helix + -o- + -meter
随便看	primary school primary schools primary shipments primary structure primary structurist primary substance primary succession primary syphilis primary tissue primary tooth primary triad primary type primary wall primary xylem primas primata primatals primate primates primateship primateships primatial primatial council primatical primatological

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。