of, relating to, or belonging to the Saurischia, an order of late Triassic to Cretaceous dinosaurs including the theropods and sauropods
noun
2.
any dinosaur belonging to the order Saurischia; a lizard-hipped dinosaur
Word origin
C19: from New Latin Saurischia, from saurus + ischium
saurischian in American English
(sɔˈrɪskiən)
noun
1.
any of an order (Saurischia) of dinosaurs with, typically, a pelvic structure similar to that of modern reptiles, including the theropods and sauropods