any of a group of extinct, typically very large reptiles of the Mesozoic era, most of which lived on the land: orders Saurischia and Ornithischia
a person or, organization, or institution that is outdated and unwilling or unable to adapt to change
Britain's industrial dinosaurs
dinosaurian /-ʹsawri·ən/ adj and noun
[Greek deinos terrible + sauros lizard]