placoderms
📖 中文释义
- (placoderm 的复数) n.[古生]盾皮鱼
🧩 词形变化
原形 placoderm
📘 English Definition（英文释义）
- plural of placoderm
- n 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