| 单词 | osteostracan |
| 释义 | osteostracan (extremely rare) n WORD FAMILY osteostracan n extinct jawless fish of the Devonian with armored head Syn|Hyper cephalaspid agnathan, jawless fish, jawless vertebrate eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms |
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英语词典包含147318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。