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di·no·saur  (dn-sôr)
1. Any of various extinct, often gigantic, carnivorous or herbivorous reptiles of the orders Saurischia and Ornithischia that were chiefly terrestrial and existed during the Mesozoic Era.
2. A relic of the past: living dinosaurs of the world of vegetation (John Olmsted).
3. One that is hopelessly outmoded or unwieldy: The old, big-city teaching hospital is a dinosaur (Peggy Breault).

[New Latin Dnosauria, group name, from Dnosaurus, former genus name : Greek deinos, monstrous + Greek sauros, lizard.]

dino·sauric (-sôrk) adj.

dinosaur [ˈdaɪnəˌsɔː]
1. (Earth Sciences / Palaeontology) any extinct terrestrial reptile of the orders Saurischia and Ornithischia, many of which were of gigantic size and abundant in the Mesozoic era See also saurischian, ornithischian Compare pterosaur, plesiosaur
2. a person or thing that is considered to be out of date
[from New Latin dinosaurus, from Greek deinos fearful + sauros lizard]
dinosaurian  adj

dinosaur  (dn-sôr)
Any of various extinct reptiles of the orders Saurischia and Ornithischia that flourished during the Mesozoic Era. Dinosaurs were carnivorous or herbivorous, dwelled mostly on land, and varied from the size of a small dog to the largest land animals that ever lived. One group of dinosaurs evolved into birds. See more at ornithischiansaurischian See Note at bird.

dinosaur  /dansr/  n. 1 any of a variety of small to huge reptiles that lived millions of years ago: Tyranno-saurus Rex was a large, meat-eating dinosaur. 2 infrml. s.o. who stubbornly keeps to old ways and ideas: He is an old dinosaur; he wont touch a computer. dinosaur

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