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a. Any of various extinct terrestrial reptiles of the orders Saurischia and Ornithischia that existed during the Mesozoic Era, including both carnivores and herbivores and often reaching a gigantic size.
b. Any of various other large extinct reptiles, such as an ichthyosaur.
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 Dīnosauria, group name, from Dīnosaurus, former genus name : Greek deinos, monstrous + Greek sauros, lizard.]

di′no·saur′i·an (-sôr′ē-ən) n. & adj.
di′no·sau′ric (-sôr′ĭk) adj.


adjDinosaurier-; dinosaurian fossilsDinosaurierfossilien pl
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References in periodicals archive ?
Most provocatively,  Anchiornis  is presented in this artwork climbing in the manner of hoatzin chicks, the only living bird whose juveniles retain a relic of their dinosaurian past, a functional claw," said Evan Saitta in a (http://www.
On certain dinosaurian vertebrae from the Cretaceous of India and the Isle of Wight.
2010): A Portuguese specimen of Camptosaurus aphanoecetes (Ornithopoda: Camptosauridae) increases the dinosaurian similarity among the Upper Jurassic Alcobaja and Morrison Formations.
We are puzzled by the weird anatomy of Chilesaurus, which recalls different dinosaurian groups," said Novas.
There are no features to suggest that any of these teeth are dinosaurian or even ornithodiran, and at least some of them more likely belong to paracrocodylomorph pseudosuchians.
Ultimately, this evolutionary flexibility helped birds survive the deadly meteorite impact which killed off all their dinosaurian cousins.
Birds out-shrank and out-evolved their dinosaurian ancestors, surviving where their larger, less evolvable relatives could not," says Associate Professor Lee.
From fieldwork and lab studies and the historical evolution of paleontological research, this considers different theories of dinosaur natural history and extinction, provides an organization of the various taxa into a workable order, and compiles dinosaurian genera, including excluded genera or doubtful genera.
Palaeontologist John Ostrom's work in the 1970s describing the dinosaurian "raptor" Deinonychus reopened the debate with new evidence that supported a theropod ancestry for birds.
Herein, we report the results of a comparative genomic analyses of the [beta]-globin gene in 11 different taxa; nine eutherian [Homo sapiens (human), Macaca mulatta (rhesus monkey), Pan troglodytes (chimpanzee), Rattus norvegicus (mouse), Mus musculus (rat), Canis familiaris (dog), Bos taurus (cow), Equus caballus (horse), Oryctolagus cuniculus (rabbit)], one dinosaurian (avian) Gallus gallus (chicken) and a neopterygii (marine) Danio rerio (fish), describing fundamental similarities and differences among taxa to enable better evolutionary understanding of functional [beta]-globin gene (Fig.