板ばん皮ぴ類るいMeanings1nounplacodermsExtinct class of armored fishes from the Paleozoic era. Used in paleontology and biology contexts.板ばん皮ぴ類るいは古こ生せい代だいに繁はん栄えいした魚ぎょ類るいの一いち群ぐんである。Placoderms are a group of fishes that flourished in the Paleozoic era.