ornithischian


Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.

or·nith·is·chi·an

 (ôr′nə-thĭs′kē-ən)
n.
Any of various herbivorous dinosaurs of the order Ornithischia, having a pubic bone that points down and backward like that of modern birds, usually a horny beak or bill, and including the hadrosaurs and stegosaurs.

[From New Latin Ornīthischia, order name : ornith(o)- + Greek iskhion, hip joint.]

or′nith·is′chi·an adj.

ornithischian

(ˌɔːnɪˈθɪskɪən)
adj
(Palaeontology) of, relating to, or belonging to the Ornithischia, an order of dinosaurs that included the ornithopods, stegosaurs, ankylosaurs, and triceratops
n
(Palaeontology) any dinosaur of the order Ornithischia; a bird-hipped dinosaur
[C20: from ornitho- + Greek ischion hip joint]

or•nith•is•chi•an

(ˌɔr nəˈθɪs ki ən)

n.
1. any herbivorous dinosaur of the order Ornithischia, in which the pelvic structure resembles that of birds. Compare saurischian.
adj.
2. belonging or pertaining to the Ornithischia.
[1900–05; < New Latin Ornithischi(a) < Greek ischium]

or·nith·is·chi·an

(ôr′nə-thĭs′kē-ən)
One of the two main types of dinosaurs. Ornithischians have a pelvis similar to that of modern birds, and include all the plant-eating dinosaurs except the sauropods. They include armor-plated, horned, and duck-billed varieties. Compare saurischian.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ornithischian - herbivorous dinosaur with a pelvis like that of a bird
dinosaur - any of numerous extinct terrestrial reptiles of the Mesozoic era
order Ornithischia, Ornithischia - extinct terrestrial reptiles having bird-like pelvises: armored dinosaurs (thyreophorans); boneheaded and horned dinosaurs (marginocephalians); duck-billed dinosaurs (euronithopods)
pisanosaur, pisanosaurus - primitive dinosaur found in Argentina
staurikosaur, staurikosaurus - primitive dinosaur found in Brazil
armored dinosaur - dinosaurs having bony armour
bone-headed dinosaur - bipedal herbivorous dinosaurs with bony crowns
ceratopsian, horned dinosaur - any of several four-footed herbivorous dinosaurs with enormous beaked skulls; of the late Cretaceous in North America and Mongolia
ornithopod, ornithopod dinosaur - bipedal herbivorous dinosaur
duck-billed dinosaur, hadrosaur, hadrosaurus - any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic
References in periodicals archive ?
2007): Notes and review of the ornithischian dinosaurs of Portugal.
Its pelvis is reminiscent of ornithischian dinosaurs with beaks, like Stegosaurus, and its wide, four-toed hind feet are similar to those of the massive, "lizard-footed" sauropods like Brontosaurus.
Teeth of enigmatic neoselachian sharks and an ornithischian dinosaur from the uppermost Triassic of Lons-le-Saunier (Jura, France).
Many of these groups later evolved their own skin appendages, including filaments on pterosaur wings, quills on the tails of some plant-eating ornithischian dinosaurs, and the proto-feathers of theropod dinosaurs.
1980): On the ornithischian dinosaur Iguanodon bernissartensis from the Lower Cretaceous of Bernissart (Belgium).
Ornithischian records are remarkable in Argentina (Late Cretaceous), however, not a single ornithischian remain has been identified so far in the Marilia Formation or the Bauru Group.
It means that feathers may have evolved, or developed over a long period of time, from structures on an ancestor of both saurichian and ornithischian dinosaurs.
47 Which creatures could be either ornithischian or saurischian?
2012): Hypsilophodon foxii and other smaller bipedal ornithischian dinosaurs from the Lower Cretaceous of southern England.
34C; impressions of teeth: YPM VP 008668, VP 008691) closely resemble those of the teeth of the basal ornithischian dinosaur Lesothosaurus diagnosticus from the Upper Elliot Formation of southern Africa (Sereno 1991).