单词	protoptile
释义	protoptile noun pro·​top·​tile (ˈ)prō¦täptə̇l plural -s : one of the first set of down feathers in young birds having two sets of down Word History Etymology prot- + -ptile
随便看	advanced in age/years advanced in years Advanced level advanced score advanced standing advancedly advancemen deeve deevil deevilick deewans def deface defaced defacement defacements defacer defacers defaces defacing defaecate defaecation defailance defaillance defalcate

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。