• (n.) An extinct genus of large herbivorous dinosaurs, found in Jurassic strata in America.
Mo`ro·sau'rus noun [ New Latin , from Greek 
Morosaurus A “stupid lizard” referring to the small size of the brain compared to the huge size of the body in sauropods. Now known as Camarasaurus. Named by Othniel Charles Marsh (1831-1899) in 1878.