placoderm

英['plækədɜːm] 美['plækəˌdərm]
  • n. [古生]盾皮鱼
  • placable adj.易慰抚的;宽大的;温和的
  • placage n.(建筑物的)薄饰面
  • placard n.招贴;海报;标语牌v.张贴布告;公布某事
  • placate v.抚慰;平息;和解
  • placatory adj.抚慰的;怀柔的;融洽的
Noun:
  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