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
Placodermi 1
noundomain: animal
Princeton WordNet [ver.3.1]
English
Definition
extinct group of bony-plated fishes with primitive jaws
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