- dinosaur - any of numerous extinct terrestrial reptiles of the Mesozoic era
--1 is a kind of archosaur, archosaurian, archosaurian reptile
--1 has particulars:ornithischian, ornithischian dinosaur; iguanodon; saurischian, saurischian dinosaur; diplodocus; titanosaur, titanosaurian; argentinosaur; ground-shaker, seismosaur