单词	Prototheria
释义	Prototheria plural noun Pro·​to·​the·​ria : a subclass of Mammalia that is coextensive with Monotremata or in some classifications includes both Monotremata and Allotheria and that is represented in the recent fauna solely by the egg-laying platypus and echidnas Word History Etymology New Latin, from prot- + -theria
随便看	Apetalae apetalies apetalous apex apex beat apex predator apex stone apexed apexes apfelstrudels Apgar score aph aph- aphaereses aphaeresis aphaeretic aphagias aphakias aphakics aphan- Aphanapteryx Aphaniptera aphanisia aphanite aphanites

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。