ornithischian

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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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

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]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

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.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
These four types are now also known from two major groups of dinosaurs -- the ornithischians, which were plant-eaters, and the theropods, which include the ancestors of birds.
But according to a study in the journal (http://rsbl.royalsocietypublishing.org/content/13/8/20170220) Biology Letters , researchers analyzed the anatomical features of early dinosaurs to come to the conclusion that the Chilesaurus was a transitional dinosaur in the Late Jurassic period that was "bridging the morphological gap" between the group of carnivores that stood up on two legs, called theropods, and the ornithischians that were mostly herbivores.
The reference to Cretaceous dinosaurs ornithischians in Portuguese territory is rare (Figueiredo, 2014).
Though the dinosaurs were ornithischians --far removed from the lineage that led to birds--the fossils bore scales and three types of feathers, Godefroit and colleagues report in the July 25 Science.
We use similar indicators to figure out what we're looking at, and while we can't identify tracks down to the species level, we can distinguish major groups, such as plant-eating ornithischians and meat-eating theropods," the expert added.
For example, among the 12 major vertebrate clades, extinctions were concentrated in seven of them; sharks, ornithischians, pterosaurus, saurischians, non-trilasghemic mammals, lizards, and marsupials accounted for about 75% of the extinctions (4).
--The other order holds ornithischians,"bird-hipped' dinosaurs.
Consequently, the ornithischians at Lo Hueco are presently restricted to the basal iguanodontian Rhabdodontidae.
The most common tetrapod fossils are teeth referable to small ornithischians and possible theropods, followed by bones and osteoderms of Protosuchus, and bones of cynodont therapsids including a tritylodontid dentary and limb bones.