ar·gen·ti·no·saur·us 
(är′jən-tē′nō-sôrəs)
(är′jən-tē′nō-sôrəs)n.
A very large herbivorous sauropod dinosaur of the genus Argentinosaurus of the Cretaceous Period, having a long neck and tail and a small head.
[New Latin Argentinosaurus, genus name : Argentina, Argentina (where its remains were found) + Greek sauros, lizard.]