( n. pl. )
A group of fossil amphibians allied to the labyrinthodonts, having the head defended by bony, sculptured plates, as in some ganoid fishes.
( n. pl. )
A group of fossil amphibians allied to the labyrinthodonts, having the head defended by bony, sculptured plates, as in some ganoid fishes.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012