placoderm
/'plækәd\\\\:m/
📖 中文释义
- n. [古生]盾皮鱼
🧩 词形变化
复数 placoderms
📘 English Definition（英文释义）
- 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