单词	hydrotheca
释义	hydrotheca noun hy·​dro·​the·​ca : a cup-shaped extension of the perisarc in hydroids of the group Leptomedusae that surrounds and protects the hydranths when they are contracted hydrothecal ¦⸗⸗¦thēkəl adjective Word History Etymology New Latin, from hydr- + Latin theca sheath, case
随便看	Congressional Medal Congressional Medal of Honor congressionalist congressionalists congressionally congressionist congressist Congressite congressman congressman-at-large congressmen congressmen-at-large congresspeople congressperson congresspersons congresswoman congresswomen Congreve Congridae congridaes congrio congroid congrue congruence congruences

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。