ornithischian

[awr-nuh-this-kee-uhn]

or·nith·is·chi·an

[awr-nuh-this-kee-uhn]
noun
1.
any herbivorous dinosaur of the order Ornithischia, having a pelvis resembling that of a bird. Compare saurischian.
adjective
2.
belonging or pertaining to the Ornithischia.

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Ornithischian has a plethora of syllables.
So is supercalifragilisticexpialidocious. Does it mean:
(used as a nonsense word by children to express approval or to represent the longest word in English.)
opposition to the withdrawal of state support or recognition from an established church, esp. the Anglican Church in 19th-century England.

Origin:
1900–05; < Neo-Latin Ornithischi(a) (ornith- ornith- + -ischia < Greek ischíon ischium) + -an
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Collins
World English Dictionary
ornithischian (ˌɔːnɪˈθɪskɪən)
 
adj
1.  of, relating to, or belonging to the Ornithischia, an order of dinosaurs that included the ornithopods, stegosaurs, ankylosaurs, and triceratops
 
n
2.  any dinosaur of the order Ornithischia; a bird-hipped dinosaur
 
[C20: from ornitho- + Greek ischion hip joint]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
ornithischian   (ôr'nə-thĭs'kē-ən)  Pronunciation Key 
Any of various dinosaurs belonging to the group Ornithischia, one of the two main divisions of dinosaurs. Ornithischians had a pelvis similar to that of modern birds (although birds are not descended from them), in which part of the pubis pointed backwards and parallel to the ischium. They also had a special bone in front of the lower jaw (called the predentary bone), and frequently had armor plating or bony outgrowths of the skull. Ornithischians comprise all the herbivorous dinosaurs except the sauropods, and include ankylosaurs, hadrosaurs, stegosaurs, and ceratopsians. Compare saurischian.
The American Heritage® Science Dictionary
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