Dictionary

pelycosaur

noun pel·y·co·saur \ˈpe-li-kə-ˌsr\

Definition of PELYCOSAUR

:  any of an order (Pelycosauria) of primitive chiefly Permian quadruped synapsid reptiles often having extreme development of the dorsal vertebral processes
ADVERTISEMENT

Origin of PELYCOSAUR

ultimately from Greek pelyc-, pelyx bowl + sauros lizard
First Known Use: 1904

Browse

Next Word in the Dictionary: PelycosauriaPrevious Word in the Dictionary: pelvorenalAll Words Near: pelycosaur
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears