ornithischiann.adj.

Brit.

/ˌɔːnᵻˈθɪskɪən/, U.S.

/ˌɔrnəˈθɪskiən/

Origin: A borrowing from Latin, combined with an English element. Etymons: Latin Ornithischia , -an suffix.

Etymology: < scientific Latin Ornithischia, order name (H. G. Seeley 1887, in Proc. Royal Soc. 43 170; < ornitho- ornitho- comb. form + classical Latin ischium ischium n.: see -ia suffix²) + -an suffix.

Palaeontology.

A. n.

A dinosaur belonging to the order Ornithischia, one of two basic divisions of Dinosauria, comprising herbivorous dinosaurs distinguished by a pelvic structure like that of birds and including the stegosaurs, ankylosaurs, ornithopods, pachycephalosaurs, and ceratopsians. Cf. saurischian adj.

ΘΚΠ

the world > animals > reptiles > extinct reptiles and dinosaurs > [noun] > Sauria > order Ornithiscia > member of

ornithischian1889

1889 H. G. Seeley in Philos. Trans. 1888 (Royal Soc.) B. 179 491 If the coracoid and pre-coracoid were united, the bone would resemble the coracoid of an Ornithischian.

1933 A. S. Romer Vertebr. Paleontol. ix. 195 It is probable that few ornithischians were entirely bipedal in habits.

1977 Radio Times 17 Dec. 45 One of the liveliest of these disputes concerns the two great groups of dinosaurs, the saurischians (with hip-bones like those of lizards) and the ornithischians (in which they were more bird-like).

1991 A. Milne Fate of Dinosaurs i. iv. 123 A similar bipedal dinosaur in size and appearance to T. Rex was Trachodon, but it was an ornithischian and therefore a herbivore.

B. adj.

Of or relating to the order Ornithischia; characteristic of ornithischians.

ΘΚΠ

the world > animals > reptiles > extinct reptiles and dinosaurs > [adjective] > of order Sauria > of or relating to ornithischian

ornithischian1893

1893 H. G. Seeley in Philos. Trans. 1892 (Royal Soc.) B. 183 349 No posterior development of the pubic bones below the ischia, such as occurs in Ornithischian Reptiles.

1901 H. G. Seeley Dragons of Air xvii. 199 In some at least of the..Ornithischian Dinosaurs, there is no antorbital vacuity.

1965 E. H. Colbert Age of Reptiles i. 19 The ornithischian dinosaurs, in which the rod-like pubic bone of the pelvis had rotated backwardly to run parallel to the ischium,..were..of late Triassic origin.

1998 L. Margulis & K. V. Schwartz Five Kingdoms (ed. 3) iii. 332/1 Ornithischian hip bones resemble those of contemporary birds.

This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022).

单词	ornithischian
释义	ornithischiann.adj. Brit. /ˌɔːnᵻˈθɪskɪən/, U.S. /ˌɔrnəˈθɪskiən/ Origin: A borrowing from Latin, combined with an English element. Etymons: Latin Ornithischia , -an suffix. Etymology: < scientific Latin Ornithischia, order name (H. G. Seeley 1887, in Proc. Royal Soc. 43 170; < ornitho- ornitho- comb. form + classical Latin ischium ischium n.: see -ia suffix²) + -an suffix. Palaeontology. A. n. A dinosaur belonging to the order Ornithischia, one of two basic divisions of Dinosauria, comprising herbivorous dinosaurs distinguished by a pelvic structure like that of birds and including the stegosaurs, ankylosaurs, ornithopods, pachycephalosaurs, and ceratopsians. Cf. saurischian adj. ΘΚΠ the world > animals > reptiles > extinct reptiles and dinosaurs > [noun] > Sauria > order Ornithiscia > member of ornithischian1889 1889 H. G. Seeley in Philos. Trans. 1888 (Royal Soc.) B. 179 491 If the coracoid and pre-coracoid were united, the bone would resemble the coracoid of an Ornithischian. 1933 A. S. Romer Vertebr. Paleontol. ix. 195 It is probable that few ornithischians were entirely bipedal in habits. 1977 Radio Times 17 Dec. 45 One of the liveliest of these disputes concerns the two great groups of dinosaurs, the saurischians (with hip-bones like those of lizards) and the ornithischians (in which they were more bird-like). 1991 A. Milne Fate of Dinosaurs i. iv. 123 A similar bipedal dinosaur in size and appearance to T. Rex was Trachodon, but it was an ornithischian and therefore a herbivore. B. adj. Of or relating to the order Ornithischia; characteristic of ornithischians. ΘΚΠ the world > animals > reptiles > extinct reptiles and dinosaurs > [adjective] > of order Sauria > of or relating to ornithischian ornithischian1893 1893 H. G. Seeley in Philos. Trans. 1892 (Royal Soc.) B. 183 349 No posterior development of the pubic bones below the ischia, such as occurs in Ornithischian Reptiles. 1901 H. G. Seeley Dragons of Air xvii. 199 In some at least of the..Ornithischian Dinosaurs, there is no antorbital vacuity. 1965 E. H. Colbert Age of Reptiles i. 19 The ornithischian dinosaurs, in which the rod-like pubic bone of the pelvis had rotated backwardly to run parallel to the ischium,..were..of late Triassic origin. 1998 L. Margulis & K. V. Schwartz Five Kingdoms (ed. 3) iii. 332/1 Ornithischian hip bones resemble those of contemporary birds. This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022). < n.adj.1889
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