A sheath-like covering. Applied to various animal and vegetable structures. ‘The horny covering of the bill or feet of a bird; esp. a sort of…
The modified integument, usually horny but in some birds leathery, that covers a bird's jaws and forms the outer layer of the bill.
英语词典包含1132095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。