单词：ostracoderms
(ostracoderm 的第三人称 -s形式) [古生]n.& adj.甲胄鱼(的)
-s form of ostracoderm
n extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic
n extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic