请输入您要查询的英文单词:

 

单词 ostracoderm
释义
os·tra·co·derm (ŏstrə-kŏ-dûrm)
n.
Any of various extinct primitive jawless fishes of the Ordovician through the Devonian periods, having bodies encased in an armor of bony plates.

[Greek ostrakon, shell; see ost- in the Appendix of Indo-European roots + -DERM.]
随便看

 

英语词典包含135693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。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2025/1/7 11:18:19