placoderms

英 [plə'kəʊdɜːmz] 美 [plə'kəʊdɜːmz]

• 盾皮鱼纲

英英释义

名词 placoderm:

1. fish-like vertebrate with bony plates on head and upper body; dominant in seas and rivers during the Devonian; considered the earliest vertebrate with jaws