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单词 placoderm
释义
Placoderm
nnoun.animalfish-like vertebrate with bony plates on head and upper body; dominant in seas and rivers during the Devonian; considered the earliest vertebrate with jaws
Member Holonyms:Placodermi class Placodermi
Hypernyms:aquatic vertebrate
Inherited Hypernyms:placodermaquatic vertebratevertebratechordateanimalorganismliving thingwholeobjectphysical entityentity
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